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How do you find a Automotive short circuit?

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βˆ™ 2007-06-28 05:04:40

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When most people say "short," they are talking about a parasitic load, a circuit that is always on and drains the battery. Take the negative cable of the battery post, take your test light (ice pick type) and connect betw battery post and negative connector. Make sure everything in the car is off (dome light, amplifier, for example). If you have a current drain at this point the light will be on. Pull fuses one at a time and watch to see which one turns out the light. That will be the circuit your parasitic load is on. Get a wiring diagram and check the wires/switches/components on that circuit. For a real short, which blows fuses as fast as you can change them, you need a special circuit breaker that fits in the fuse panel in place of the fuse. This will power the circuit enough to work with it, but prevent meltdown. Now that you have current flow, you can run a small compass over where the wires for that circuit are running and watch for the needle to switch directions. Ask at the parts store, I don't recall what they call this ciruit breaker.

2007-06-28 05:04:40
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