Question about 1992 Oldsmobile Cutlass Supreme

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Battery drains when driving, starter replaced alternator checked ok

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  • Zaraki Sep 13, 2010

    Check the #5 - 15 amp fuse out under the hood in the relay center, and also check the #16 - 15 amp fuse that is in the fuse box under the instrument panel.

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  • 149 Answers

You have a wiring problem somewhere

Posted on Sep 13, 2010

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Posted on Jan 02, 2017

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Going through starters and alternators?


If you keep replacing starters and alternators, they aren't the problem. Starters: check your battery's ground cable.
Alternators: Make sure you're also replacing the rectifier circuit. Alternators make alternating current and it must be converted to direct current. This happens in the rectifier, and arrangement of three diodes. Diodes are like a one way street for electricity. But sometimes, they fail and leak backwards.
Then they quietly drain your battery overnight. It drives a lot of people nuts figuring that one out.

on Aug 13, 2012 | 2000 Ford Ranger SuperCab

1 Answer

Radio going off and on..air conditioner going off and on..gauges flickering and won't start


It could be a faulty alternator. This would cause a battery drain since the alternator would not be recharging the battery and supplying operating voltage to the vehicle. Once the battery dropped to about 8 volts then the gauges, A/C, radio and other electronics would start acting crazy. Eventually the car would have shut down, but since you stopped at the post office, that didn't happen. With the battery being so low in charge, that would not allow the car to restart, as there would not be enough current to engage the starter properly. Check the battery voltage. If it seems ok (12-13 volts), try checking it again with someone trying to start the car. A normal battery will see some voltage drop, but a drained one will fall to almost zero with a starter load. Since you have gauges and not warning lights, a discharging battery may have gone unnoticed. If you determine the alternator is bad, be sure to have the battery charged, or if necessary, replaced before using the new alternator. A low battery can cause a new alternator to fail and most alternator warranties will not cover this type of failure.

Sep 05, 2014 | Cars & Trucks

1 Answer

Well driving my 2003 Chevy Monte Carlo SS the onboard computer seems to be resetting itself and the battery is continuously being drained


I would have your altinator checked and make sure it is putting out at least 13.5 volts at the battery while running if not the check your wires to the starter from the battery and if ok replace the alternator.

May 05, 2014 | Cars & Trucks

1 Answer

My taurus wont start


If your alternator and starter is good. You might have a dead cell in your battery, If your battery checks ok, then you have a bad ground= corroded or broken wire.

Jan 04, 2014 | 2001 Ford Taurus

1 Answer

2006 Impala Battery drains while car is running. Battery has been tested, alternator has been replaced. Connections to battery, alternator, aux power have been checked. Happens intermittently, sometimes...


drive belt tension
have the voltage regulator checked /replaced
if it is faulty the battery will drain as it is running all of the electronics without help from a alternator
AS the ecm draws a lot of current, a battery not charging will not last long
most modern cars run about 85% of the alternator with the rest for charging the battery
if the voltage regulator is part of the ECM, replace the ecm unit

Mar 28, 2017 | 2006 Chevrolet Impala

2 Answers

I was having problems getting my 1997 jetta to start in the mornings, after getting it jumped, it would be okay. I replaced the battery and was having no problems. On Christmas Day, I didn't start it at...


CHECK ALTERNATOR OUT PUT SHOULD BE 13.5 VOLTS TO 14.5 VOLTS.IF NOT ALTERNATOR IS NOT CHARGING BATTERY.CHECK ALTERNATOR FUSE AND CHECK ALTERNATOR POSITIVE FEED WIRE AND VOLTAGE REGULATOR WIRES.IF ALL IS GOOD ALTERNATOR NEED TESTING AND REPLACED.IF ALTERNATOR GOOD BATTERY CABLES COULD BE OLD CAUSING POOR GROUND AND HIGH RESISTANCE IN POSITIVE CIRCUIT. STARTER SOLENOID FAULTY IF NOT BEEN REPLACED.

Dec 28, 2010 | 1997 Volkswagen Jetta

1 Answer

While driving late last night, all gauges went dark. Needed to replace a battery this morning, still no gauges working and replaced a 2nd battery. Batteries keep draining and still no gauges. All fuses...


DID U CHECK THE STARTER TO SEE IF IT IS GOOD!!!MAKE SURE THE WIRE IS CONNECTED REAL GOOD TO THE STARTER TOO!!! B/C IT WILL DRAIN YOUR BATTERY!!! THE SAME WITH THE ALTERNATOR IT TOO WILL DRAIN YOUR BATTERY!!

Jul 06, 2009 | 2000 Nissan Pathfinder

1 Answer

Car died and will not restart


Have you had your Battery,starter and alternator checked? if starter or alternator bad will drain battery. If battery is bad will damage alternator over period of time. If not changed. Also check your battery cables, make sure your +/- is without corrosion. Possible voltage regulator.Hope this helps..
Sviguerias@yahoo.com

Jan 15, 2009 | 1998 Dodge Neon

1 Answer

1999 Volvo S80 will not hold a charge


Tricky ... Was the alternator replaced with a 2nd hand one or a new one?

A defective alternator can allow the battery to discharge within a few minutes (the diodes in the rear of the alternator can burn out and cause the problem. The diode pack can be replaced). When this happens recharging the battery only replaces the power in the battery - which drains straight back to earth via the alternator, flattening the battery again - often within a couple of minutes or less.

Does the battery lose its charge when the car is standing or just when the engine is fired up?
If the battery loses its charge overnight, try disconnecting the wiring from the rear of the alternator (also look at the electrical connector that fits into the back of the alternator - look for melting/burning marks which suggest something may be amiss inside the alternator).

Let the car stand overnight with the alternator wires disconnected. Will it start up ok and drive (with the alternator wires still disconnected) the next morning?

You could also try just disconnecting the alternator wires, firing up the car and then driving it -
If the car drives ok without dying out and gets further down the street than it usually does, then it probably is the alternator at fault. The car should drive until the battery drains and has insufficient power to trigger the ignition. You certainly would get further down the street with a charged battery and disconnected alternator than you currently do.

It does sound as though you've had an alternator fault to begin with. If it has been replaced with a 2nd hand unit that unit may also be faulty. Rather than replace parts in desperation, visit an auto electrician's - within a few minutes they will be able to test the battery/alternator output and also identify where the lost current is going. It will be cheaper in the long run to have an auto electrician look at the charging system. It only takes a few minutes.

Sep 14, 2008 | 1999 Volvo S80

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