XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

electrical short circuit

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Old 07-12-2014, 11:45 AM
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Default electrical short circuit

1988 xjs coupe: I have a short circuit where by I am drawing about 4 amps with nothing turned on. (Cost me a battery before I started checking)
Does anyone have some ideas about where should I start looking?
Also where do I look for the left and right terminals?
 
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Old 07-12-2014, 12:02 PM
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If you had a short circuit it would blow the fuse and be easier to find. You have either got a circuit that is not shutting down or a circuit that is staying live due to a ground fault.

If you know you are drawing 4A then I'm assuming you have a meter.

If this were me I would put the car in the position where you have the draw, pick a fuse box and start pulling fuses until you find the culprit.

Alternatively, you can use a test light and trace the circuits that are live when they shouldn't be.

Either way it may take a while, but be methodical and you will find it.

Hope this helps,
 
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Old 07-12-2014, 12:41 PM
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Originally Posted by nicksa10
1988 xjs coupe: I have a short circuit where by I am drawing about 4 amps with nothing turned on. ......
I've moved your question from USA Southwest - AZ TX NM OK to XJS forum.

The model forums are the place for tech questions and members here with the same model should be able to help.

Graham
 
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Old 07-12-2014, 06:53 PM
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I agree with Jim. Place amp meter inline and remove fuses and relays1 by 1 until meter falls. You may find you have several places. Clean connection and work through that circuit and retest.
 
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Old 07-13-2014, 10:13 AM
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Thanks guys I was hoping it would be easier than squeezing my fat butt down into the foot wells.
If I knew where the (right) and (left) main positive nodes were I could isolate down to the starter/Alt area or the main fuse panel areas. I have a gut feeling it's in the starter/alt area.
Thanks again
 
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