Question about 1998 Pontiac Grand Prix

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I have replaced the battery and alternator and the battery light is still on. I have cleaned the cables, I have replaced the bolts at the battery posts, I have spliced off the end conecting wire at the alternator and it still won't hold a charge for more than a couple of days. The light will come on all of the sudden and the car will die. It has ruined 2 batteries already. When they test it at auto zone on the bench and while on the car it tests good but the light is still on???????

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  • Pontiac Master
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I will give you a couple of ideas to try but these types of problems are hard to trace. I want to say take it someplace where a starter can be checked as well as the connecting wires to the starter and solenoid. The solenoid may be cracked or the wires running to the solenoid may be burnt.
If the battery light is still on try pulling and replacing fuses one at a time until the light goes out. At this point you have found the short. Leave out fuse and see if the car starts and what no longer works. Now you have an idea what is broke.
You may want to replace the keyswitch if the above tests do not work. You really want to keep on this because the electricity can start a fire. Best of Luck

Posted on Jul 21, 2009

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Wire coming from ecm is broken probably along intake

Posted on Jul 21, 2009

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  • Master
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My nephew had a similar problem on his car and I found that there was a short in the one of the wires in the plug that plugs on the alternator. I found this out by having him sit in the car watching the light while I moved the wires around at the plug. I pulled the wire out and had to pry a small rubber bushing out. I stripped the wire and soldered it into the plug. Sounds like a very similar problem. Sure hope this helped and good luck.

Posted on Jul 21, 2009

  • Bruce Canfield
    Bruce Canfield Jul 21, 2009

    By the way, autozone also bench tested my nephew's alternator and it was good.....because it was!!....the short in the wiring was making the alternator output intermittent, not enough to keep up with demand, and it kills the battery. You should also check the voltage regulator. If it is defective, it can cause the same problem.

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    f52fc60.jpg

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    ffe1937.jpg

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    6ce39ae.jpg

    Fig. 3 Remove the 2 front alternator mounting bolts and ...

    45a032e.jpg

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    6513790.jpg

    Fig. 5 ... out of the engine compartment
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    1 Answer

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    Check all of the above and let me know Ron
    Are you on Skype

    Oct 13, 2009 | 2002 Chrysler Town & Country

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