Question about 1995 GMC Safari

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Something slowly drains the battery - 1995 GMC Safari

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  • rniii Jul 17, 2009

    not it

  • yadayada
    yadayada May 11, 2010

    MAKE SURE THE VANITY LIGHTS ARE NOT ON ALL THE TIME, VERY COMMON ISSUE WITH DRAIN LIKE YOURS.

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  • Master
  • 580 Answers

Have you alternator tested it may not be putting out the needed amperage

Posted on Jul 17, 2009

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My transit van on a53 plate, is draining the battery, I have had new alternator, and battery but it is still draining battery,


Battery drains are always fun. Generally it means that something you either hooked up recently to a direct hot wire is draining the battery or there has been a wire that got hot enough to melt another wore on the system and cause a full time connection. Other than taking it to the dealer and letting them put a breakout box on your system to isolate the problem, you could put a volt meter on your battery, if there is truly a drain on the system you will see the volts slowly drop, then open your fuse box and one by one start pulling fuses until you find the one that's pulling on the battery, (you'll know this when the volts on the meter stop dropping). When you find the fuse that's pulling the volts down, you'll then be able to start tracing the circuit for that fuse and everything connected to it. It's a PIA but it's something you'll have to do, unless you want to pay dealer prices.

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Electrical problem


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I have a light that comes on saying theft control?. The cars starts well , but seems something is draining the battery. I turned the radio on with car running and it stalled. It started again , but co


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Does not start, battery ok. alternator and starter test out ok


The car battery has 6 cells, each cell holds 2 volts, and connected in series adds to 12 volts. Just like your flashlight, each battery hooked in series results in increased voltage. Its possible one cell is not holding a charge, which slowly drains power from adjacent cells. In battery series connection, if one cell won't hold a charge, electrons will flow to lowest cell voltage in attempt to equalize voltage. So when one cell drops to less than 2 volts, the electrons from other cells will flow to this cell to recharge and bring voltage up to equalize voltage level. To diagnose for dead cell in 6-cell car battery, remove the 6 caps to expose the electrolyte liquid AFTER you have recharged the battery for 20 minutes with 10-amp charger, or until "fully charged" indicator comes "on." With a digital voltage meter set to 5 volts DC reading, connect the negative black probe to negative side of battery and touch the liquid electrolyte with the red positive probe. The voltage meter will display the voltage reading on each cell as you move the red positive probe from one cell to another. Make a note of each voltage reading from each cell. Wait one hour or more, then take another reading of each cell. The cell that has the lowest reading is the one that's draining power from the adjacent cells. A normal battery will show no change in voltage level between the first and second reading an hour later. A defective battery will show a drop in voltage to indicate one or more cell is slowly draining power to gradually render the battery completely dead 36 hours later.
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Nov 29, 2013 | 1999 Toyota 4Runner

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I have a Battery/Alternator error on a C240 2001 model. I started the car and checked the charge via a voltmeter and it was 14.22. Another unusual thing is that when left for a day or two the battery wil...


You have what is called a "parasitic drain" that is draining the battery on your car while is not running. Something is staying on after you turn the key off, it could be any number of things, from a stuck relay to a trunk light staying on that slowly drains the battery. A parasitic drain test will need to performed to determine the cause so repairs can be made....Here is a link that explains how to do this test....Make sure your battery is fully charged before starting this test. Also, after you disconnect the battery cable, wait 15-20 minutes before starting the test...this allows any capacitors to drain and not give a false reading...
Good luck, i hope this helps.

http://www.wikihow.com/Find-a-Parasitic-Battery-Drain

Jul 17, 2011 | 2001 Mercedes-Benz C-Class

1 Answer

I HAVE A 2001 VW BEETLE.EVERY MORNING I HAVE TO JUMP THE BATTERY OFF.I CHANGED STARTER,ALTERNATOR IS OK.EVERY MORNING IT MAKES A CLICKING SOUND BEFORE JUMP IT OFF.


Have your battery load tested. It sounds like overnight it's slowly losing it's charge. Another possibility is something electrical is "on" or draining battery overnight.

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2 Answers

I have a brand new battery in the vehicle and it went dead in less than 2 weeks. Would the computer located in the fender well have anything to do with the battery being dead? I have had the alternator...


You need to check for something that is a constant drain on the battery.
Is the underhood light staying on?
Are the interior lights left on?
Is the glove box light staying on?
Has anything been added to the van recently like an alarm, radio, amplifier, etc?
Do you leave your GPS unit plugged in or cell phone charger plugged in?
I would start my search (since you have already had the alt output checked) looking for something that is draining the battery slowly.

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1 Answer

If car is left parked for 2 weeks the battery is drained. today it was 11.7 volts. When I start it the battery volts goes up to 13.54 and is charging OK. New battery. Something slowly drains it if it is...


had the same type problem with van that had security system on it.. even if not armed it would drain battery if not driven at least once a week. this might be same type of problem.

Nov 27, 2009 | Mercedes-Benz C230 Cars & Trucks

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My 2005 impala wont start after a few days of not running it. i took it to a mechanic and they said i had a short in the ignition switch so i paid to fix it and the problem is still happening. its like...


Either the alternator is not charging the battery or there is an improper drain on the battery. To test both you need a multimeter that will measure current and volts. If you can get one and can use it, let me know and I will continue.

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