Question about Chevrolet S 10

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Have 1998 s10 LS, automatic, 2 wd, 2.2L. Replaced the coils recently due to miss fire problem. Thought perhaps this would also possible solve the voltmeter registering negative charge during operation. Did not and now something is draining the battery. I have replaced the battery and the starter. Don't want to change the alternator until I can be sure this is not due to a dead short somewhere. Any ideas as to where to start and what to look for would be most appreciated.

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  • electricpet Sep 11, 2010

    thanks a bunch. Just one question more... what is an amp HU?

  • electricpet Sep 11, 2010

    Great info. Thanks!

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  • Chevrolet Master
  • 19,396 Answers

Hi.

First test the alternator. This is tested by revving up the engine and reading volts with multimeter across battery terminals. The voltage should be at least 13.5 V or the alternator is shot.

Also ensure that the alternator belt is well in tension and not worn.

If the alternator is good, then the problem is a parasitic drain. This is a fault that is often difficult to find (for that reason there are car electricians). The fault is found testing continuity and volts in different points.
Here a broad description of how to:Power parasitic drain.

Posted on Sep 11, 2010

  • Ginko
    Ginko Sep 11, 2010

    Hi.

    Thanks for the feedback. HU stands for head unit. It is the stereo.

    Have a good day.

    Ginko.

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