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I have a discharge warning light on in my car. The car will start and run for a while (on a charged battery) but it soon powers down (dash nad cabin lights dim to almost zero) and the car shuts off.

The alternator and starter are about 10 months old, and the battery is about 8 months old. I took the battery out put it on a trickle charge, cleaned the terminals, checked the fuses and checked wires to and from the battery and the alternator for any obvious damage. I then hooked the battery back up and started the car, letting run for about 1 hr until it shut itself down.

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  • Cars & Trucks Master
  • 21,873 Answers

If you know for a fact the alternator is working, the problem could be an open circuit between the alternator and battery.

Posted on Dec 02, 2014

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6ya6ya
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Posted on Jan 02, 2017

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emissionwiz
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SOURCE: car starts run's 3 seconds shuts down

Your car is equipped with a system called PASSKEY standard on all GM cars and light trucks, try the following procedure to reset the system, the battery being dead will trigger the system.

PASSKEY LOCKOUT RESET GM CARS 1999 UP
1) Put the key in the ignition and turn to the "ON" position. Leave it that way for 10 minutes. After 10 minutes turn the key and take it out. Repeat this process (2) more times (3 times, 30 minutes total) This should reset the passlock system to recognize your key.

Posted on Mar 30, 2009

oldfishead
  • 155 Answers

SOURCE: battery not charging

check the fuses in the POWER DISTRIBUTION BOX under the hood, There is a 75A in-line fuse and #11 - 15A fuse see if they are good.... test your alt. loom for opens, and cables .....hope this helps...GL

Posted on Jul 06, 2009

  • 12650 Answers

SOURCE: Battery charge light comes on and doesn't go out.

need to check the wiring and connections at and to the alternator and battery -most cars still run when battery doesnt charge because the alt output keeps it running if no out put from alternator the car is running on battery only an will stall when battery depleted

Posted on Feb 20, 2010

  • 435 Answers

SOURCE: my battery light is on

Sounds like your voltage regulator is acting up, and at times will not let alternator voltage reach the circuit. At this point car stars drawing on battery alone (triggering battery light) and working until it is out of juice. Before you buy a new voltage regulator, make sure that its contact points on the alternator, and the plug from it to the vehicle circuit is clean, shiny and making good contact. These parts, due to their location tend to collect dirt and moisture, leading to an intermittent performance before they stop working completely.

Posted on Oct 02, 2010

  • 436 Answers

SOURCE: Daughter called me ..car wont

it sounds like you have blown fuse to the Alternator.. I don't know what car you are talking about but they charging systems vary.. But if alternator isn't getting all the power it needs it won't charge. this should be checked.

good luck

Posted on Oct 21, 2011

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