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Page 1 of 2  The weakest link in an electrical chain is the fuse. That’s by design. If a circuit gets too much power, you want the fuse to blow rather than the radio, computer, or other gadget. That make’s sense. Also it makes sense to first check the car’s fuse system when something electrical that should work quits.
Car Words
A fuse is an electrical component that’s designed to fail first before an electrical overload damages other, more expensive, components. A fuse box(or fuse panel) is a group of fuses placed in a relatively convenient location.
How and where can you check fuses? The hard part may be finding them. Fortunately, most modern cars put all fuses together in one, two, or (probably) both spots:
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Under the hood near the battery (battery, headlight, stoplight, hazard light, horn, heater, air conditioner, and other fuses and relays)
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Inside the car under the dashboard (wiper, coil, turn lights, washer, mirrors, fuel pump)
Tech Tip
To quickly test fuses, buy a test light (available from auto parts stores), hook the light to a nearby ground connection (see the light’s instructions), turn the car’s ignition to on and touch the light’s probe to the fuse. If the tester lights up (continuity), the fuse is good. Using this method, you can quickly test many fuses without removing them.
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