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How can I find an electrical short in my car?

It seems like my car may be having electrical issues, and from what I’ve been able to tell, I may have an electrical short somewhere. Is there an easy way to find where the problem is occurring?

avatar
Jason Crosby · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
To find where the electrical short is occurring in your vehicle, you’ll need some equipment: an electrical wiring diagram (EWD), a test light (or multimeter), a screwdriver, wrenches, and pliers—anything you’ll need to access your vehicle’s wire harnesses or fuse panels.
The first place to start is to
check your fuses
. You can pull one at random, and apply your test light to the fuse socket. If your test light produces a light, then there’s an electrical current running through that socket. While it may seem like a pain, it’s a great idea to check each fuse for issues.
Next, you can check any suspected individual wires for shorting problems. To do this, disconnect a wire in one of either two places—either at the sensor, or at the load endpoints. You can then run your test light along the wire, looking for places where the current stops. If neither of these steps produces any
signs of a shortage
, take the car to a technician, unless you’re a confident and experienced home mechanic. The risk of electrocution or faulty wiring isn’t worth saving a few hundred dollars to have your car inspected and tested by a pro.
And for more professional help, go with
Jerry
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