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Ford Bronco Wiring Diagram - Ignition, Wiper Motor & Back-Up Light Circuits

Wiring diagram for wiper, washer, back-up light and ignition circuits with color-coded wires
Wiring diagram for wiper, washer, back-up light and ignition circuits with color-coded wiresOriginal file
Wiring diagram for wiper, washer, back-up light and ignition circuits with color-coded wires

Reference · 1978-1979 BroncoAll 116 wiring diagrams

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Automotive wiring diagram showing windshield wiper, washer, back-up light and ignition circuits with color-coded wire labels.

Part of 1978-1979 Ford Bronco Wiring Diagrams

AI caption · Photo 178 of 200

This document is a scanned page of an automotive wiring diagram covering the engine ignition, wiper/washer, and back-up light circuits of a Ford vehicle. It shows the fusible link feeding the circuit from the battery/ignition switch side, the carburetor solenoids, and a throttle solenoid fuse rated 7.5A (hot in run). The windshield wiper motor and windshield wiper switch are connected by wires colored BLU, BLK/WHT, WHT/BLK, WHT/ORN, and RED, protected by a 15A back-up/wiper fuse (hot in run). A separate 15A back-up light fuse feeds the back-up light switch (WHT/PNK in, BLK/RED out to the back-up light) and the neutral/clutch safety switch via RED/BLU wires to the ignition switch. The ignition coil (RED/GRN, GRN/YEL) connects through a noise filter, and the distributor (BLK/GRN) and ignition module (RED/BLU, PPL/BLU, ORN/YEL, WHT) tie into the ignition switch and alternator indicator circuits. Wire color codes are labeled throughout. A reference number, 85766104, appears at the bottom right. Readers can use this diagram to trace fuse ratings, wire colors, and component interconnections for troubleshooting ignition, wiper, and back-up light problems.

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Frequently asked questions

What size is the throttle solenoid fuse?
The throttle solenoid fuse is 7.5A and is hot in run.
What fuse protects the back-up lights and wiper circuit?
A 15A back-up/wiper fuse (hot in run) protects the wiper circuit, and a separate 15A back-up light fuse feeds the back-up light switch.
What wire colors run between the windshield wiper motor and the wiper switch?
The wires shown are BLU, BLK/WHT, WHT/BLK, WHT/ORN, and RED, plus another WHT/BLK through the 15A back-up/wiper fuse.
What wire colors connect to the ignition coil?
RED/GRN and GRN/YEL wires connect to the ignition coil, with the GRN/YEL side passing through a noise filter.
What wires connect the ignition module in this diagram?
The ignition module connects via RED/BLU and PPL/BLU wires to the ignition switch, ORN/YEL from the distributor side, WHT to the alternator indicator, and BLK/GRN from the distributor.

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