Gm Alternator Overcharging

Check the size of the pulley on your alternator. When you’re building a car and have to start from scratch with your electrical wiring, the one-wire alternator will save you a lot of hassle – and help to keep the engine compartment tidy. With all the things pulling a charge off the cranking battery ( Motor starting – 150 HP, Graph, Livewell pumps,Ect. GM Alternator Bracket Conversion Our bracket is engineered for use with ANY 10 Si or 12 Si series Delco Remy alternator. To identify an alternator system, inspect wire or wires that come from under or behind the blower housing. This can kill the car's computer and other expensive electrical components. I replaced the alternator with one that I got from a salvage yard (to save money) but it is still over charging at the same voltage. New alternator (twice over) and new regulator (the box on the wall inside the engine area) All the wires are intact and working as best I can tell. Today (the next day after it working fine) there's no rise in voltage after the engine starts. Aug 20, 2011. Alternators have a voltage regulator on/in them. It will run at about 14 to 15. 8L Taurus the small frame is a direct physical fit for the 65A 2G the large frame is a direct fit for the 100A externally regulated units. The alternator on your vehicle uses the rotational power of the engine to generate electricity and keep the car running. Since most automotive applications have the alternator bolted to the. If your alternator does not charge, or your alternator was overcharging, it will most likely fail. No Charge at All - This can appear just like an undercharge condition, but revving the motor does nothing. Voltage reading is the same at the battery and output stud of alternator. Detroit Diesel Starters Motors for 53, 71, 92, 149 & 60 Series. 2013 Equinox 3. I also replaced the voltage regulator and it still overcharging. The low voltage may be indicative of issues with your alternator. Prestolite Electric / Leece-Neville is a global manufacturer of alternators and starter motors selling into niche markets for heavy duty (truck, bus, emergency, off-road), marine, military and industrial applications. 72 olds to be exact. AMP single-wire alternator keeps a battery charged under all kinds of driving conditions. OUCH ! Open the Hood and check out put , I get 18 volts across the battery ! Brilliant. The mechanic replaced it with a common GM 10si alternator that can be bought rebuilt for about $45. 7 volts, but only if engine is rev’d over 4500 RPM for 3 seconds. answered 3 years ago. 0L GM 181 I/L4 3. ) Then, use a ratchet to take the. Here are a couple of things to keep in mind when maintaining your Absorbent Glass Mat (AGM) battery, including an OPTIMA® battery. The wiring harness was made by Speartech. Today, I went to get a new battery as the one it had had a lot of leaking acid underneath it. It is a constant. The alternator warning light means there is an issue with powering the battery. The alternator voltage is chosen for a reason – it is an appropriate float charge voltage for most batteries. If you do not read a jump to 14 volts when you kick over the engine, alternator/regulator failure is usually the culprit. An overcharging alternator is the result of a bad regulator in the alternator ASSUMING all wires, connections, contacts are in proper order and not buggered. Alternator Plug Conversion You will need a new connector to fit the new alternator and they can be purchased at almost any auto parts shop. alternator overcharging I have a 2002 CRV only has 4,400 miles on it. 63 Amp DL7127 12M. If you are not using a smart charger to charge your 12V deep cycle batteries, the charging current should be at least 10% of the amp hour rating for a flooded lead acid battery or up to 30% for an AGM lead acid battery. I have a 2006 GMC 1500 with the 5. #2 is the voltage sensing terminal and MUST be connected to battery voltage or else the alternator will definitely overcharge the battery. It has a 350 Chevy engine in it. It was putting out 15. Voltage reading is the same at the battery and output stud of alternator. As expected for a nearly charged battery, the current flowing into the battery from the alternator was small, 1 amp. to put out more voltage. If you were in the 15vdc or higher range, I'd consider that the alternator is overcharging. Discussion Starter • #1. Brand new alternator. also bought the truck with what appears to be a deep cycle marine battery, pretty hefty looking SOB. Alternator is overcharging the battery and generally putting out WAY too much power. I used the lead with a resistor in it, not being too concerned with the volts bulb, having a gauge. Bear in mind that this warning has been intermittent. GM has a technical bulletin regarding a whine noise in the radio. 2L had an overcharging alternator. Hmmm, At fast idle it's pegged at 60 amps out. If the engine batteries are OK and the coach batteries are overcharging when the coach is plugged in, you have a inverter/charger or converter problem, depending on what is installed in your coach. Most alternators have an output between 13 and 14. 3 people found this helpful. 6V with engine running, which means your alt is charging = ok. This is a normal function (of a lot of GM vehicles); voltage is monitored, and when a certain stasis (e. The EMS-4 doens't have a control like this by default but depending on your wanting or ability to test different things, you might be able to come up with an acceptable way to control the alternator. 2003 saturn truck vue v6 3 0l vin b timing belt service and repair manual, 2003 SATURN VUE 3. Clip the Samurai plug off. rechecked fuses View 2007 Chevrolet Silverado 1500 LT 4. I've invented perpetual Electricty !!!. What make/model alternator would you recommend as a replacement if that is the recommended course?. Upgrade Your GM Charging System with A One-Wire Alternator Curing Tire & Wheel Fitment Problems with Narrow Disc Brakes A stock 1964 Chevelle SS gets a modern makeover at Roadster Shop. I'm doing some research into various power systems and it often seems like it would be convenient to use an automotive alternator for charging. GM usually wired this small red wire to the battery cable connection on the starter, but most hot rodders just connect it to the output of the alternator (the screw terminal that the big red wire connects to). Then I ended up putting another alternator on that came with a newer motor I was putting in. Belt Tension Gauge. I verified voltages with my DVOM at the alternator and battery. for 1975 and 1976 TR6. The Alternator is not your standard GM Alternator. OUCH ! Open the Hood and check out put , I get 18 volts across the battery ! Brilliant. ) Part Reman Battery R I Number Number Type Volts Term Term Term Amps DELCO REMY O. If the alternator still does not perform to current rating, refer to the next section ' Finding The Problem ' to determine where the problem is located. voltage reg or whole altinator. Techmate Pro - Marine Engine Diagnostic Scan Tool - 94070 + 94006. I guess I'll take the alternator to an actual alternator shop and verify it's condition before spending $$$$ elsewhere. It has a 350 Chevy engine in it. Overcharging and Undercharging. Sign in to make your opinion count. Established in 1899, ACDelco manufactures original GM parts and premium OE replacement parts for other brands in the automotive aftermarket. If more current passes through the field coil, the alternator generates more current. View your GMC vehicle's specific recall information and active notifications at the GMC Owner Center. 6V with engine running, which means your alt is charging = ok. 5 to 13 which I think is normal. The output of an alternator is typically between 13. ) GM 305 V-8 1987 230 (4 BBL. I reference the Delco alternator used in most GM late 70's cars and trucks with a 350 cu. This may not be necessary. A pigtail and wiring diagram are included in the kit. Hmmm, At fast idle it's pegged at 60 amps out. Since most aut. The following picture shows 14. voltage reg or whole altinator. I changed battery,now charging under 15 ,so I changed alternator and now it charges more,so I put old one back on. 7 volts, but only if engine is rev’d over 4500 RPM for 3 seconds. Alternator is overcharging. This thing is putting out anywhere from 14. 5 volts that they try to maintain at a constant level. Bearing noises: In some cases, an alternator may still function properly, but. If the alternator was bad, then driving to autozone and then back could be enough to drain the battery - particularly since it sat for a few days after that. Improperly jump-starting the vehicle can send a surge through the battery that destroys one or more cells in the battery or shorts it out. I've pulled the adapter lead and remove. 5 is normal charge mode. , battery is at full charge), the alternator reduces charging effect (thus saving a little fuel and the battery to a certain extent). 5 volts that they try to maintain at a constant level. Alternators that overcharge will typically produce excess voltage to the battery, making the battery case swell up, become very hot and lose its electrolyte through boiling. Average failure mileage is 14,300 miles. Voltage reading is the same at the battery and output stud of alternator. This external voltage regulator is designed for use with Chrysler alternators. Lately, it has been going up almost to the last mark before overcharge. If I Unhook the alternator and hook up my battery charger on while the car is running, I can do a 20amp charge it runs between 13-14volts on my gauge, and the car runs PERFECT. Then check the sensing wire on the alternator for a good connection and for continuity. The one-wire alternator must - by definition - regulate its output voltage. REQUIRES A GOOD GROUND In order for an alternator to charge properly, an alternator must be grounded to the engine block. 6V with engine running, which means your alt is charging = ok. If your alternator has a bad diode, your battery can drain. Testing the alternator, to see if it's the cause of your 3. 3 volts, if the alternator is charging any more or less it means it can not regulate the voltage to correct level, and the vehicle performance will suffer, there may not be any specific reason behind it, there probably isnt anything you did to cause it or could have done to prevent this either, just because you have a Honda. It runs continuously at the ~14vdc range to continue to provide all the power the car needs as well as keep the battery charged. A car uses quite a lot of electricity to work the ignition and other electrical equipment. If the reading stays the same or drops, that means the alternator isn't charging and you may need a new one. A car uses quite a lot of electricity to work the ignition and other electrical equipment. Most alternators have an output between 13 and 14. 4V, at the alternator, and the regulator is now limiting or holding the voltage steady at 14. One of the key differences is how the internal voltage regulator determines charge rate. I've already bought a new alternator and battery and I am having them both replaced on Sunday. All that is done internally by the alternator voltage regulator. It was introduced on the 1969 Corvette, and by 1973 most GM built cars and light trucks used this model alternator. It is most commonly used in custom vehicles to clean up the wiring, replacing an alternator that used an external regulator, or adding a second alternator to the vehicle. Sign in to report inappropriate content. Voltage regulator: a component that limits the voltage going to the battery to prevent overcharging. Chrome alternator and power steering only serpentine all inclusive kit. The regulator is inside the alternator. Unfortunately, issues with the alternator could cause overcharging that may be bad for the health of the battery. Despite changing to an extra alternator and then to a brand new one the overcharge was still there. externally. One of the major gripes with battery chargers is that you need to disconnect it manually after it has fully charged the battery to prevent overcharging. New alternator (twice over) and new regulator (the box on the wall inside the engine area) All the wires are intact and working as best I can tell. I have seen known bad batteries and alternators test good and vice versa. If you battery is boiling that is an indication the alternator is overcharging the battery. The early GM 1-wire alternators (1972-1986) will need to have the RPM raised to 1000 ? 1200 RPM initially to get the alternator charging and then it will continue to charge after that. All that is done internally by the alternator voltage regulator. An alternator is a charging system for cars that produces electricity. Undercharge Symptoms 2-2 2-3. If you add heavy loads, driving lights, high power stereo, etc, you can exceed the capacity of the wires. The bad alternator diode can. it has been overcharging the battery, i put a new voltage regulator on it, its the external type mounted on the firewall, and it was then charging well over 15 volts, i put the old one back in and it was back to a bit under 14. The 2004 Chrysler Crossfire has 3 problems reported for alternator overcharging system. Item four to check is the field wires themselves. 3 I have 15+ volts at my Battery, (actually from my alternator). Within a week of putting the altnernator on the BRAND NEW battery is barely able to start the c. The main component in the charging system is the ALTERNATOR. Yes alternators give off heat, they have an internal fan to cool it. The circuitry of a battery maintainer is able to charge the battery at much higher rate while regulating the current to prevent overcharging. 6l Northstar Engine 2003. 8 volts!!! Even with the lights and windshield wiper on it's still above 14. The two obvious solutions are to change the alternator to a later model that already charges at a higher voltage, or to fit an external alternator controller. We're talking plain truck wiPlain truck, no dashboard. Re: Alternator overcharging I hope one o fthe 3 wire connections isn't external sense. theyre trying to sell me on a new battery but this alternator looks like hard hammered shit with grease all over it. Had overcharging issue and replaced alternator after mechanic said issue was internal voltage regulator. But the dealer won't do it under warranty (or just to make a customer happy) and my Dad doesn't think he should have to replace the Alternator on an almost new truck, especially when it is GMs fault it isn't working right in the first place. Improperly charging AGM batteries will shorten the life of the battery and cause it to face premature aging, which means the battery will die sooner than it should. Unsubscribe from AutoMate Training? Sign in to add this video to a playlist. Acadia 2015 alternator/ charging system. However, if the alternator isn't working correctly, it may send too great of a charge to the battery, which is known as overcharging. The alternator is a key component in your car's electrical system, turning the energy from the crankshaft into useful electricity to power your vehicle's electrical systems and to help the battery recharge. Lubed them up and they quiteted down a bit but the alternator belt would not. Voltmeter is working normally. Remove alternator bracket bolt shown in figure 18 and install the [Filename: 1023310-1023311_GM_C4500-5500_Air_Brake. To wire a warning light using one of these alternators, simply remove the terminal plug cover and connect the R (Left terminal, looking from the back of the alternator) to the warning light wire. If the reading stays the same or drops, that means the alternator isn't charging and you may need a new one. Overcharging and Undercharging. Rechecked all wiring. It is most commonly used in custom vehicles to clean up the wiring, replacing an alternator that used an external regulator, or adding a second alternator to the vehicle. Voltage reading is the same at the battery and output stud of alternator. When this occurs, the alternator does not operate properly and malfunctions as the source of self-generating. Classic Industries offers a wide selection of 1970 Chevrolet Nova parts, including 1970 Chevrolet Nova interior parts and soft trim, 1970 Chevrolet Nova exterior sheet metal, 1970 Chevrolet Nova moldings, 1970 Chevrolet Nova emblems, 1970 Chevrolet Nova weatherstrip and unique accessories, to nearly every nut and bolt needed for installation. So I figured the overcharging alternator was burning up the electrolytes in the battery, causing it to lose it's charge overnight (0 degrees here). Yesterday, we took the battery and alt. My system would need it to charge a string of batteries rather than just a single one, that is, 24v, 36v, 48v, whatever it is. * The ignition switch is most commonly powered from the starter battery stud, but source may vary depending on application. For what it's worth, I have essentially zero faith in autozone/advance/etc battery and alternator testing stations. It kept driving the alternator harder and harder until it was developing 17 volts. March 23rd. Any voltage higher than this will indicate an overcharging condition. Despite changing to an extra alternator and then to a brand new one the overcharge was still there. It was loose. Output is within 10% of the amperage rating for. If you battery is boiling that is an indication the alternator is overcharging the battery. If the power came from an ordinary battery, it would soon run down. Alternator Plug Conversion You will need a new connector to fit the new alternator and they can be purchased at almost any auto parts shop. I had a bad regulator (reason for rooting around the alternator) on this ford I was working on and it would intermittantly put out full field current and cause the alternator to charge at 44A into the battery (I had a clamp-on ammeter on it so I know!). If the alternator was allowed to constantly produce all the power it could, system voltage would rise to a damaging level, the battery would overcharge, components would be damaged, and the alternator would soon overheat and burn out. Check the size of the pulley on your alternator. Signs of a bad voltage regulator in a vehicle include dimming or pulsing lights or a dead battery. 5 then charge only when needed. If your alternator does not charge, or your alternator was overcharging, it will most likely fail. Most of the units use Delco 10si (some set up as single wire and some std) and another using the 70s chrysler chargins system. (a fifty mile one-way drive, BTW, so it. If you are working on a 1990 to 2007+ GM car or truck, refer to: GM bulletin #43-64-07A. Overcharging Alternators Cause Battery Damage When a vehicle's engine runs, the alternator generates electricity for the battery. It's likely to go out again as charge voltage can go high-er than needed without external sense lines hooke dup. "To be clear, GM’s RVC systems use alternators with field currents that truly are controlled by logic external to the alternator. 5 and 2 volts above your base voltage. Overcharging and Undercharging. The good news is PowerMaster Performance offers 10Si and 12Si high output clones that make as high as 140 amps. Alternator Repair Service Shropshire Cost effective specialist alternator repairs may include bench test or strip and test of individual alternator components then replacement such as fitting of a diode pack, stator, rotor, bearings or. Discussion Starter • #1 • Aug 24, 2010. According to the diagram I have the Battery wire hooked up correctly. the other two wires go to the positive terminal of batery, if. The internal regulator will try to maintain the proper voltage at whatever point in the system the sense wire is hooked up. About a year ago I helped a friend with his 99 STS (he had just bought it with what was said to be a faulty alternator and also maybe a faulty PCM) and changed the alternator for him. This bypasses the normal regulator to increase the charging rate. In turn, the alternator needs to replenish the battery and provide the power for the vehicle loads through the charging cables and connections. It has a new engine harness, New alternator, and a new external regulator. I also change. The Alternator needs to be charging the battery between 13. 0L GM 181 I/L4 1990-1994 3. It will run at about 14 to 15. It kept driving the alternator harder and harder until it was developing 17 volts. 12-21-05 06:44 PM - Post# 837707 In response to Hi Bryan, In the past with my folks '89 Ponitac car they had went through alternators like a human changing clothes. If the reading stays the same or drops, that means the alternator isn’t charging and you may need a new one. Of course, make sure that all of your connections are clean and tight. This item NEW ONE WIRE 1-WIRE ALTERNATOR GM DELCO 10SI LOW TURN ON SPEED. Using digital multimeter for testing of automotive charging system (photo credit: Rick's Motorsport Electrics via Youtube) Perhaps the most important tool you’ll use in troubleshooting auto electrical systems is the multimeter, usually digital. Compare 2004 Ford Ranger Alternator brands. With the electronic systems installed in today's vehicles, they can be damaged with voltage spikes coming from the alternator when disconnecting the battery. Here is the second, an alternator recall: #10117A: Product Safety - Voltage Regulator Internal Low Resistance Short - (Jul 14, 2010) Condition Remy, who supplies generators to GM, has decided that a defect, which relates to motor vehicle safety, exists in certain 145 amp generator. Discussion Starter • #1. Avoid the Top 10 Electrical Snafus This is why MAD recommendsusing the GM 10Si or Cs130 alternators, even in many Ford applications. This electrical input is carefully balanced to keep the battery from running out of juice. I am still overcharging i have put on brand new alternator and voltage regulator i have changed out the plug to regulator and have moved regulator from firewall to fender and grounded it pretty well. If the reading is more than 2 volts higher, that could mean that your alternator is overcharging. January 28th, 2014, 8:16 PM. If you have a poor connection anywhere that the sensing wire is connected to it may cause the regulator to sense a low charge and increase the field current to the alternator field causing it to overcharge. PART NUMBERS (CONT. No Charge at All - This can appear just like an undercharge condition, but revving the motor does nothing. 3 vin#1gnfk16377j208156 , 83000 mi. Since the problem occurs with 2 different alternators, this component can be ruled out as the reason for the overcharge. Bought a replacement alternator but I am sending it back as I measured and have seen it running over 16. It takes a while for the residual magnetism to decrease enough that it even needs the exitation kick provided through the switched wire. 5 volts in battery 2001 Ford Expedition Alternator doesnt charge battery,then sometimes it does. GM 1-Wire Alternator Operation Most 1-wire alternators have a charging point set around 1200rpm or higher. This 1990 Dodge Ram W150 5. So a car has a rechargeable battery and a charging system to keep it topped up. View online or download Yanmar 3GM30C Service Manual, Operation Manual. Joined Jan 31, 2011 · 74 Posts. Also put in new battery at that time as. It had a bad regulator, which is the part that controls the output of the alternator. where was the voltage measured from (test terminals)? the automobile alternators were designed to put out a maximum of 16 volts unregulated assuming the battery is connected, engine running and the belts is tight and in good condition. Painless offers exceptional reproduction wiring harnesses. Your regulator could be bad and overcharge the battery. I do have a question about testing the alternator if the voltage is normal to be as high as 15. com as a daily part of their ownership experience. The ECU is in the charging circuit in a 2g so you may have to look elsewhere for answers. Tech mentioned it might be ecm. View online or download Yanmar 3GM30C Service Manual, Operation Manual. The two obvious solutions are to change the alternator to a later model that already charges at a higher voltage, or to fit an external alternator controller. If you battery is boiling that is an indication the alternator is overcharging the battery. But, this is a great opportunity to install a rebuild kit to insure reliability and maximum performance. We were reading both alternators charging at over 15. 5 and 2 volts to around 13. April 18th, 2014, 07:28 PM Well got the alternator back from Mechman they said it tested out ok and they couldn't find anything wrong with it, so I put it in the car and of course it did the exact same thing and pegged the volt gauge. The early gm alternator is the 10dn series alternator and was used on gm. 147 Lockout/Tagout Requirements. And it doesn't matter if you currently run an externally regulated alternator-the 10si and the 12si bolt right onto the bracketry in early GM 4x4s and can be mounted onto most non-GM 4x4s. I am using a complete Holley LS Engine Swap Accessory Drive Systems Part #20-138 that includes a 130 amp alternator. (Or Terminal Post if your vehicle is so equipped). Alt was used on 1970's Datsun pickups I think. 2 max right?. The only way the alternator would be the cause is if the field terminal was wired incorrectly directly to the battery voltage bypassing the regulator. An alternator is a charging system for cars that produces electricity. Jriven · Registered. This article covers the majority of 3. Go look at Ammeter and at idle it's at about 30 amps out. The old one never went over 14V and usually hovered around 13-13. Welcome to the Blazer Forum - Chevy Blazer Forums. Alternator is overcharging. It's a 10SI alternator. 2L 16 Valve V8 SOHC Super Duty Block. The root cause of this issue is the turbo’s bypass valve, or blow-off valve. The alternators were bought from O'Reilly's auto parts. Wired it all up, was testing it & it got hot quick! Voltage was also rising steadily, no matter what. You may have to register before you can post: click the register link above to proceed. 8 volts you may want to increase this in order to get a much higher charge current into your batteries. 5 volts)! If I were to drive for several hours at this point, I would certainly do damage to the AGMs, which are said to be sensitive to overcharging!. I looked up the wiring diagram and was able to locate and remove the wire, except there seems to be a problem: it was just a 10 ga wire running from the alternator to the starter, and about half way in between was another 10 ga wire spliced into it running to a junction block on the firewall above. Tension the alternator until the belt is securely tightened in place. An alternator can be called a type of generator. Joined: Jan 10, 2007 Posts: 754. It's a 10SI alternator. I changed battery,now charging under 15 ,so I changed alternator and now it charges more,so I put old one back on. Also put in new battery at that time as. Improperly charging AGM batteries will shorten the life of the battery and cause it to face premature aging, which means the battery will die sooner than it should. Just replaced the alternator on the car, it came with a smaller pulley than the old burned out one that was on the car. The battery would go dead if i was in the vehicle listening to the radio at a soccer game, so i put in a new battery. Avoid the Top 10 Electrical Snafus This is why MAD recommendsusing the GM 10Si or Cs130 alternators, even in many Ford applications. Ford PCM controlled alternators will charge at a default rate of about 13. by Dan Masters, [email protected] A problem that is not as easy to diagnose is overcharging, which occurs when the voltage regulator fails to limit alternator output. But essentially the same from 64-72 from what I am told. To start viewing messages, select the forum that you want to visit from the selection below. 5 volts that they try to maintain at a constant level. The one-wire alternator must - by definition - regulate its output voltage. The engine is swapped into a 2001 Chevrolet S10. Now I got an exact replacement but my battery light keeps coming on. I've already bought a new alternator and battery and I am having them both replaced on Sunday. This thing is putting out anywhere from 14. The circuitry of a battery maintainer is able to charge the battery at much higher rate while regulating the current to prevent overcharging. An alternator can be called a type of generator. Joined Jan 10, 2011 · 69 Posts. We were reading both alternators charging at over 15. Alternator Overcharging. Is there any sort of mechanic or garage where you live?. The charging system in these newer GM vehicles is far more complicated than just a traditional voltage regulator and alternator. Also, my dash ammeter pegs to 30+ when I rev the engine up. These Tuff Stuff Chrome Alternators are: Hand polished and triple chrome plated to a mirror finish. 79V and considerably less current can flow into the bank at 13. If it is giving too much resistance then this will tell the Alt. 3G alternator (130 amp) for our swap comes in large and small frame sizes small frame can be found stock in 1995 5. When you upgrade the charging system in an old car without upgrading the wiring the extra amperage will find the weak links in the system. The overwhelming majority of General Motors products have used alternators with the same basic terminals since 1986. Here are a couple of things to keep in mind when maintaining your Absorbent Glass Mat (AGM) battery, including an OPTIMA® battery. If the battery is over 14. I changed my alternator in July 2018. You must verify that all required connections are connected to the proper terminal and have the correct voltage in order for the alternator to operate properly. We sell wholesale to the public. You should get between 0. Profile Page. If you battery is boiling that is an indication the alternator is overcharging the battery. where was the voltage measured from (test terminals)? the automobile alternators were designed to put out a maximum of 16 volts unregulated assuming the battery is connected, engine running and the belts is tight and in good condition. 86 GT: I bought a CS130 Alternator and adapter lead to replace my 12SI. The two obvious solutions are to change the alternator to a later model that already charges at a higher voltage, or to fit an external alternator controller. If the reading stays the same or drops, that means the alternator isn’t charging and you may need a new one. The Canadian Tire replacements all seem like the GM 10SI though. Engines, Motors, Fuel Tanks, and more. This is the same state-of-the-art engine powering the F-Series Super Duty Trucks that boasts best-in-class gas horsepower and max tow ratings. 32 volts at the alternator output … Continue reading "2002 GMC Sierra, Erratic Charging Condition, Battery Goes Dead". (Repair pig-tails for this connector available at any autoparts store. Unfortunately, bearing replacement is a short-term fix and you may be better off replacing the unit entirely. Cost me $375. 1 is fuel economy mode. The alternator warning light means there is an issue with powering the battery. Hope this helps if you still think there is a problem have it checked out. On modern vehicles, an overcharging alternator may result in an illuminated check engine light. All that is done internally by the alternator voltage regulator. I've replaced my alternator three times in the last two years. Each section describes a. Alternators that overcharge will typically produce excess voltage to the battery, making the battery case swell up, become very hot and lose its electrolyte through boiling. One cause could be a shorted cell in the battery. When you're building a car and have to start from scratch with your electrical wiring, the one-wire alternator will save you a lot of hassle - and help to keep the engine compartment tidy. Both whines will vary in pitch with the engine RPM. OK, the test is divided into three parts: PART 1 - Testing the alternator voltage output with the multimeter in VOLTS DC mode. alternator overcharging Discussion in 'Engine & Performance' started by MatthewGoff, Apr 15, 2018. If that is the alternator output, you will get the 14. You can test to see if the alternator is overcharging, using a simple voltmeter. ) The car has 72000 miles on it. These Tuff Stuff Chrome Alternators are: Hand polished and triple chrome plated to a mirror finish. Voltage regulators are commonly found in vehicles and other electronic equipment. If the reading is more than 2 volts higher, that could mean that your alternator is overcharging. This article covers the majority of 3. Checked the alternator directly from the large post to ground, still 15 volts. On older cars they are seperate items from the alternator but a lot of modern cars are built in to the alternator. 0L GM 181 I/L4 3. In my case it was the voltage sense wire that went from the battery back to the alternator. The later style GM and all Ford and other style 1-wire alternators will excite immediately when the vehicle is started. When the computer screws up, the alternator charges as high as 18+ volts and boils the battery to death. About a year ago I helped a friend with his 99 STS (he had just bought it with what was said to be a faulty alternator and also maybe a faulty PCM) and changed the alternator for him. It should be around 14. An overcharging alternator can kill a battery and boil the fluid out of it. Rechecked all wiring. You should get between 0. ALTERNATOR INSTALLATION, Any Style - AC-201. About 2 seconds to go from one # to the next. 08-06-2009, 04:14 PM. GM 1-Wire Alternator Operation Most 1-wire alternators have a charging point set around 1200rpm or higher. 4V, at the alternator, and the regulator is now limiting or holding the voltage steady at 14. I reference the Delco alternator used in most GM late 70's cars and trucks with a 350 cu. The windows were open couldn't do anything. A few days later it will do the same thing again. alternator and alternator exciter wire, coil, water temperature, and oil pressure. Joined Jan 10, 2011 · 69 Posts. I've replaced my alternator three times in the last two years. do NOT contact me with unsolicited services or offers. Without the alternator, the battery will eventually discharge. 5 volts)! If I were to drive for several hours at this point, I would certainly do damage to the AGMs, which are said to be sensitive to overcharging!. 5V, measure at the alternator. Both are normal due to the power managment system. How to make an external voltage regulator fro an alternator. The voltage, however, was the full output voltage of the alternator (14. Two weeks prior to this alternator fire I took it in for a loud sqealing noice. This electrical input is carefully balanced to keep the battery from running out of juice. Everything seems fine tho, just seems to be overcharging if anything. If the street is too narrow to carry the current, it shows up in measurable "voltage drop" or loss. 6L- 153,000 2003 Trailblazer 4. An overcharging alternator can "boil a battery dry", so if your battery gets low on electrolyte, making you add water to it, or if you car "eats batteries", you may have an overcharging alternator. My 140 amp powermaster (#37294, one wire) GM style alternator has started overcharging recently. The problem may come from the alternator or the electrical circuit. Improperly jump-starting the vehicle can send a surge through the battery that destroys one or more cells in the battery or shorts it out. The early gm alternator is the 10dn series alternator and was used on gm. battery discharge completely, the alternator can possibly recharge with enough current to overload the wires. However, an overcharging alternator will overcharge the battery and boil it over showing such indications prior to any skepticizm about the alternator. If more current passes through the field coil, the alternator generates more current. Discussion Starter • #1 • Mar 3, 2011. Issues with these specific components result in the alternator overcharging the vehicle's battery and electrical system. Most Car type Alternators will NOT overcharge a 12 VDC Battery, simply if they did, everyone would be killing off the batteries i the vehicles. Alternator is overcharging. this kit will install the same as the stock " three wire " alternator was designed to. After a bit of research, I started looking into the wires coming from the plug on the side (Sky Blue and White/Red). It's a marine type with screens to prevent an exp. So I finally narrowed down my short to the hot wire that goes from the alternator to the starter. Output is within 10 amps (15 for CS series) of rating for. 6l Northstar Engine 2003. Sunday morning overcharging to 15. My 99 Jeep Cherokee XJ and 97 Buick Park Ave are older cars that orignally came with flooded batteries. Now I got an exact replacement but my battery light keeps coming on. Have charging system checked before replacing alternator. I used the lead with a resistor in it, not being too concerned with the volts bulb, having a gauge. System overcharging alternator putting 16. 2001 Alternator : How To ? Printable View. GM 1-Wire Alternator Operation Most 1-wire alternators have a charging point set around 1200rpm or higher. We're talking plain truck wiPlain truck, no dashboard. This can kill the car's computer and other expensive electrical components. The truck died over the weekend. If you battery is boiling that is an indication the alternator is overcharging the battery. should i bother with taking it off and testing it or is it shot? most of the winter it was overcharging a little and it worried me but always evened out. 2L had an overcharging alternator. It provides steady voltage control in conversions utilizing the 1989-2002 Cummins engine and can be used in custom applications as well. Type: IR N 19 Fits Toyota MR2 S L IG Reg. You’ll see two things right off the bat on RVC vehicles tipping you to the presence of this latest technology: First, you’ll see a two-wire voltage regulator connection instead of the familiar four-wire connection. 8 volts with a load on it. This bypasses the normal regulator to increase the charging rate. Wired it all up, was testing it & it got hot quick! Voltage was also rising steadily, no matter what. About a year ago I helped a friend with his 99 STS (he had just bought it with what was said to be a faulty alternator and also maybe a faulty PCM) and changed the alternator for him. Discussion Starter • #1 • Jul 13, 2015. REMANUFACTURED ALTERNATORS 5 Interchange Miscellaneous Remanufactured Starters Remanufactured Alternators Popular New Service Starters Popular New Service Alternators 10SI (cont. AGM stands for absorbed glass mat, basically meaning that the acid/electrolyte is soaked up by a fiberglass mat that fills the space between the lead plates. A faulty fusebox can also cause this problem by sending the wrong information to the regulator as well, causing it to overcharge. This current is immediately converted to Direct Current (DC) inside the alternator. Went to the mechanic to check levels and he says my alternator is giving it 17( watts/volts) rather than the 12-14 it's supposed to. When this occurs, the alternator does not operate properly and malfunctions as the source of self-generating. But essentially the same from 64-72 from what I am told. If your alternator does not charge, or your alternator was overcharging, it will most likely fail. Discussion Starter • #1 • Mar 3, 2011. Jriven · Registered. The alternator on your vehicle uses the rotational power of the engine to generate electricity and keep the car running. REMANUFACTURED ALTERNATORS 5 Interchange Miscellaneous Remanufactured Starters Remanufactured Alternators Popular New Service Starters Popular New Service Alternators 10SI (cont. 6V with engine running, which means your alt is charging = ok. For those of you with an overcharging condition, check the green field wire carefully. I verified voltages with my DVOM at the alternator and battery. This is not a condemnation of the one-wire alternator. Would there be a problem replacing a (?)~90 amp 12SI unit with a 63 amp 10SI? There is no extra equipment like a/c, power windows, or even a radio. Brand new alternator. However, if your voltage reading remains the same or slightly lower than base voltage, the charging system isn't working. It should be around 14. The overcharging may come from a bad voltage regulator in the alternator. We sell wholesale to the public. If you were in the 15vdc or higher range, I'd consider that the alternator is overcharging. 5 is normal charge mode. 32 volts at the alternator output … Continue reading "2002 GMC Sierra, Erratic Charging Condition, Battery Goes Dead". I'm using the external regulator diagram for simplicity, but the troubleshooting procedure isn't much different with the regulator in the ECM. Go look at Ammeter and at idle it's at about 30 amps out. FWIW, Chrysler products have had temperature-based voltage comp built into the electronic regulators since they came out circa 1971. Most alternators made up until the late 80's had an internal standalone voltage regulator. Issues with these specific components result in the alternator overcharging the vehicle's battery and electrical system. Alternators that overcharge will typically produce excess voltage to the battery, making the battery case swell up, become very hot and lose its electrolyte through boiling. Check the size of the pulley on your alternator. It runs continuously at the ~14vdc range to continue to provide all the power the car needs as well as keep the battery charged. New alternator, Still overchargingWTF. So I recently did a CS144 upgrade. It had a bad regulator, which is the part that controls the output of the alternator. Does overcharging cause problems? Does it effect how the fuel injectors. • A single wire with no diode is generally, but not always, an AC only system • A single wire with a diode is generally a DC only system. Try the Sierra / Sonar Engine Finder Tool to shop for engine parts by engine make and model. The seals in your car had best all be functioning properly if you expect your car to work right. REQUIRES A GOOD GROUND In order for an alternator to charge properly, an alternator must be grounded to the engine block. By Dan Marinucci. My system would need it to charge a string of batteries rather than just a single one, that is, 24v, 36v, 48v, whatever it is. Now take a look at what is going on at the battery end. Hmmm, At fast idle it's pegged at 60 amps out. ok, I appreciate the help,guess I should start over,I have a 07 suburban,5. FWIW, Chrysler products have had temperature-based voltage comp built into the electronic regulators since they came out circa 1971. Someone else couldn't fix it. So, I do a little googling to see what I could learn. The regulator is internal to the alternator, and the ecu doth NOT control it or regulate any part of it. Any voltage higher than this will indicate an overcharging condition. (Or Terminal Post if your vehicle is so equipped). I'd prefer to purchase an alternator alone without a kit, I'm cheap. I've done a little bit of. A pigtail and wiring diagram are included in the kit. I have a 2009 G8 GT with about 93,000 miles on it. If a heavy load is placed on the alternator, the current flow will cause a voltage drop across the alternator wire. Bought a replacement alternator but I am sending it back as I measured and have seen it running over 16. When you upgrade the charging system in an old car without upgrading the wiring the extra amperage will find the weak links in the system. Overcharging: An alternator that is overcharging may result in short bulb life. The main component in the charging system is the ALTERNATOR. 8 volts you may want to increase this in order to get a much higher charge current into your batteries. theyre trying to sell me on a new battery but this alternator looks like hard hammered shit with grease all over it. I think two alternators overcharging is more than coincidence. It was an option with at least some 70, 71, and 72 GM cars, although it rarely showed up in those years, except for on the Corvette where it was standard equipment. Mando Alternator. Voltage Regulator Plug Identification Alternators & Starters IG FR L D Reg. At idle, count on 65 amps of battery power, meaning lights stay bright and sound systems. This causes the alternator to overcharge the battery, which in turn can ruin the components that use electricity. This time the alternator is overcharging. 8 volts you may want to increase this in order to get a much higher charge current into your batteries. Any voltage higher than this will indicate an overcharging condition. That's why the regulator saw 12. GM further states that mineral oil and PAG oil are chemically compatible. But essentially the same from 64-72 from what I am told. Type: IR N 17 L S S Outside IG Harness Regulator Inside IG L Reg. Step 6: Secure the replacement voltage regulator by reattaching in to the alternator with the same set of screws and bolts that you removed earlier. Unfortunately, bearing replacement is a short-term fix and you may be better off replacing the unit entirely. If you were in the 15vdc or higher range, I'd consider that the alternator is overcharging. ) and academic research institutions all over the world have begun to do research on advanced vehicle development including Electric Vehicle (EV), Hybrid Electric Vehicle (HEV) and Fuel Cell Vehicle (FCV). 817119A 4 Contact us for Proper Application 55 amp, V-belt application. 2L had an overcharging alternator. Within a week of putting the altnernator on the BRAND NEW battery is barely able to start the c. And it doesn't matter if you currently run an externally regulated alternator-the 10si and the 12si bolt right onto the bracketry in early GM 4x4s and can be mounted onto most non-GM 4x4s. An alternator can be called a type of generator. You could completely remove the alternator from the car and your engine would still start and run normally UNTIL THE BATTERY WENT DEAD!. It will run at about 14 to 15. It was an option with at least some 70, 71, and 72 GM cars, although it rarely showed up in those years, except for on the Corvette where it was standard equipment. Alternator and Starter Diagnosis. At idle, count on 65 amps of battery power, meaning lights stay bright and sound systems. Re: Battery Overcharging How does Gm wire the Battery on the drive side? If They just run the batery cables from right to left, the right battery is getting the charge from the alternator and the left one just gets the over flow to come up to full charge. As this rotor turns, it drags a magnetic field past the stationary coils that surround it. It's likely to go out again as charge voltage can go high-er than needed without external sense lines hooke dup. I noticed the big white wire connecting to alternator's main output terminal was brown at the last inch adjacent the lug that bolts to the main terminal. ALTERNATOR CIRCUITS. NOTE When the voltmeter is connected in parallel. Trying to figure out an alternator overcharging issue. 220,000 miles on it its probably bad. An alternator can be called a type of generator. Voltage reading is the same at the battery and output stud of alternator. 200 (2 BBL. Trace the field wires from the back of the alternator to the voltage regulator. I've done a little bit of. Yuasa Battery Charging Chart. The 10SI has three terminals (including those with a 1 wire regulator). (Repair pig-tails for this connector available at any autoparts store. When the alternator overworks, it stresses the car’s engine. Today (the next day after it working fine) there's no rise in voltage after the engine starts. Here are a couple of things to keep in mind when maintaining your Absorbent Glass Mat (AGM) battery, including an OPTIMA® battery. Check the reading on the voltmeter again. If your output voltage is too high you need to remove the alternator and take it to a repair shop and have them fix it or just get a rebuilt one and replace the unit. 0L GM 181 I/L4 1 1998. Many alternators require ignition voltage to initiate charging. MC33099 MC33099 MC33099FS/D Alternator regulator mosfet alternator alternator voltage regulator programmable Alternator regulator gm Alternator Voltage regulator alternator Controlled Alternator Voltage Regulator alternator diode MC33099DW: 1995 - voltage regulation of alternator using microcontroller. This bypasses the normal regulator to increase the charging rate. If not that then yes, two bad voltage regulators. The two obvious solutions are to change the alternator to a later model that already charges at a higher voltage, or to fit an external alternator controller. Someone else couldn't fix it. If your alternator charges at, say, 13. Presenting Pressure Main Bearings Oil in stock and ready for shipping today!. GM alternator wiring GM alternator wiring. from San Antonio Texas. #2 is the voltage sensing terminal and MUST be connected to battery voltage or else the alternator will definitely overcharge the battery. Troubleshooting Charging Problems: ALTERNATOR AND VOLTAGE REGULATOR. The problem is the alternator is charging at 16-17 volts. you will probably come out with an overdrive ratio. The initial voltage is high as the alternator delivers more current to the battery to make up for the charge lost by starting. My GM alternator nightmare continues. IT should give you a warning light if there was a problem. Don't know if that's enough of a difference to cause serious overcharging. 5 volts which is still high, any ideas on what else to check, could the alternator itself be bad, i thought the. At idle, count on 65 amps of battery power, meaning lights stay bright and sound systems. Brand new alternator. Get the best deals on General Motors Car & Truck Alternators & Generators for Buick when you shop the largest online selection at eBay. 2 max right? My question is this, Does my truck have an external Voltage Regulator? If not, the voltage regula. 3 volts it closes the contacts on the. 3 I have 15+ volts at my Battery, (actually from my alternator). 0L V6 Timing Belt RockAuto. The original alternator connector wire that went to the 'F' terminal on the alternator will go to the '2' terminal on the new plug. Last week I found out that the alternator was overcharging (charging at around 15. 66 to $2,386. The price of a new alternator can run from $500 to $1,000. We recently replaced the stock alternator in my 87 GT, the replacement is a Delco-Remy remanufactured alternator. 0L GM 181 I/L4 3. BRIGGS & STRATTON ALTERNATOR CHART (10 A.