Ford D9ZZ-14526-H Circuit Breaker Assembly

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The electrical circuits of the vehicle are protected by a combination of fuses, circuit breakers and fusible links. The fuse block is located below the left side of the dash. Later models have two fuse blocks, one for standard fuses located under the instrument panel on the left side of the dashboard and one for high current fuses in the engine compartment, adjacent to the battery. Disconnect the cable to the negative battery terminal before replacing high current fuses. On earlier models the fuses are tubular glass body types while on later models miniaturized fuses are employed. These compact fuses, with blade terminal design, allow fingertip removal and replacement. If an electrical component fails, always check the fuse first. The best way to check a fuse is with a test light. Check for power at the exposed terminal tips of each fuse. If power is present on one side of the fuse but not the other, the fuse is blown. A blown fuse can also be confirmed by visually inspecting it. Be sure to replace blown fuses with the correct type. Fuses of different ratings are physically interchangeable, but only fuses of the proper rating should be used. Replacing a fuse with one of a higher or lower value than specified is not recommended. Each electrical circuit needs a specific amount of protection. The amperage value of each fuse is molded into the fuse body. If the replacement fuse immediately fails, don't replace it again until the cause of the problem is isolated and corrected. In most cases, the cause will be a short circuit In the wiring caused by a broken or deteriorated wire.

Fuse links are used in circuits without standard fuses, providing overload protection. They're smaller than the circuit wire and color-coded: green (14 gauge), orange (16), yellow (17), red (18), and blue (20). These links are non-repairable and must be replaced with an identical new one. To replace, disconnect the battery ground and the damaged link from the starter relay. Cut and discard the damaged link, strip 1/2 inch insulation from the circuit wire, and crimp in a suitable new link. Solder each end of the new link, insulate with electrical tape, and reconnect everything. Test the circuit afterwards for proper operation.

Fuse links are used in circuits without standard fuses, providing overload protection. They're smaller than the circuit wire and color-coded: green (14 gauge), orange (16), yellow (17), red (18), and blue (20). These links are non-repairable and must be replaced with an identical new one. To replace, disconnect the battery ground and the damaged link from the starter relay. Cut and discard the damaged link, strip 1/2 inch insulation from the circuit wire, and crimp in a suitable new link. Solder each end of the new link, insulate with electrical tape, and reconnect everything. Test the circuit afterwards for proper operation.

The fuses and relays in the Power Distribution Box are replaced in the same manner as the fuse panel inside the vehicle. The power distribution box cover is hinged on one end and utilizes a retaining latch on the other. Simply release the latch and lift the cover up to gain access to the fuses and relays.

A blown fuse can be identified by inspecting the broken metal element inside the glass tube.

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

When replacing blown fuses, it is important to replace them with the correct type. Fuses of different ratings are physically interchangeable, but only fuses of the proper rating should be used.

When replacing blown fuses, it is important to replace them with the correct type. 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.

Bypassing the fuse with metal or foil can cause serious damage to the electrical system.