- 1). Inspect your fuse box for any burnt or busted fuses. Locate your fuse box by referring to your owner's manual. Remove fuses that are causing individual problems. For example, if your backup lights do not work, then you would remove the backup light fuse. Use standard pliers to remove the fuse. Replace the fuse if the metal link inside it is separated. Reinstall it if the link is still intact.
- 2). Perform a voltage check by using a test light, available at most auto shops. Disconnect your car's battery to prevent against electrical shock. Locate other wires using the wiring schematic in your car's repair manual. Insert the test light probe into each wire. The brighter the light, the better the wire's condition.
- 3). Use a voltmeter if any results from the test light come back positive. This could indicate there is a bigger problem with the car's wiring. Use your car's repair manual along with the voltmeter to locate the faulty wiring.
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