Question about 1998 Volkswagen Jetta

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1998 vw jetta has 10.3 volt draw when you take the neg. cable off battery. pulled all fuses and still have draw so i pulled wires out of pos. side of battery one at a time and found that the main power supply to fuse box was the problem, any ideas on what might be causing this problem.

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Unhooke your altinator it has 6 diodes in it if one is bad it will drain the battery and still charge,unhook it and recheck I bet that is your problem,Thanks and I hope this helps

Posted on Oct 01, 2009

Testimonial: "i have the 1998 jetta with battery draw problem i did diconnect the altinator still had draw but very good advice.thanks"

  • Donnie Wilson
    Donnie Wilson Oct 01, 2009

    What a diode is ,a one way check valve for electricity,I bet when you unhook you alt and recheck there will not be ant draw

  • Donnie Wilson
    Donnie Wilson Oct 01, 2009

    Ok lets think of something else like the mercury switchs hood, trunk clove box,one other thought is the ecm unplug it and recheck,sound to me like your doing a good job by yourself and you have a good plan of attack on this,if I think of something else I will add it

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Unhooke your altinator it has 6 diodes in it if one is bad it will drain the battery and still charge,unhook it and recheck I bet that is your problem,Thanks and I hope this helps

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2 Answers

There is a problem with a wire harness and it continues to drain the battery. How do i find it?


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connect the pos.[red]of your volt meter to
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if there is a draw it will show on your meter.
if thats the case start pulling your fuses one at the time until you find the circuit thats killing your battery

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