Hummer 12177251 Fuse

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The electrical circuits in a vehicle are safeguarded by a combination of fuses, circuit breakers, and fusible links. Fuse and relay boxes can be found in the engine compartment and inside the vehicle, typically at the left end of the instrument panel. Each fuse is designed to protect a specific circuit, and the fuse panel cover identifies the various circuits. If the cover is missing or difficult to read, consult the owner's manual for a complete guide to all fuses and relays in both boxes. Miniaturized fuses are used in the fuse blocks, and if an electrical component fails, always check the fuse first. A test light can be used to check for power at the exposed terminal tips of each fuse. If power is present on one side but not the other, the fuse is blown. Replace blown fuses with the correct type, as fuses of different ratings are physically interchangeable but only fuses of the proper rating should be used. The amperage value of each fuse is molded into the fuse body. If a replacement fuse immediately fails, do not replace it again until the cause of the problem is isolated and corrected, which is often a short circuit in the wiring caused by a broken or deteriorated wire.

Medium and large fuses can be removed by hand.

If a fuse is blown, replace it with the correct type. Fuses of different ratings are physically interchangeable, but only fuses of the proper rating should be used.

The electrical circuits in a vehicle are safeguarded by a combination of fuses, circuit breakers, and fusible links.

It is crucial to replace blown fuses with the correct type and rating.

Circuit breakers protect specific circuits like power windows and power seats. They reset automatically, so if there is an electrical overload, the circuit will momentarily fail and then come back on. If the circuit does not come back on, it should be checked immediately. Using a voltmeter, each end prong of the circuit breaker should be tested for battery voltage with the negative lead on a good chassis ground. If there is battery voltage only at one end, the circuit breaker needs to be replaced.

The fuse panel cover identifies the various circuits protected by fuses. If the cover is missing or difficult to read, consult the owner's manual for a complete guide.

This product is made out of hardened plastic