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1979 Ford Bronco/F100-F350 Wiring Diagram - Conventional & Interval Wipers
Reference · 1978-1979 BroncoAll 116 wiring diagrams
Wiring diagram page showing conventional and interval windshield wiper circuits with wiper motors, switches, and governor.
Part of 1978-1979 Ford Bronco Wiring Diagrams
This page (page 37) from a Ford wiring diagram manual shows two side-by-side schematics for the windshield wiper and washer circuits: 'Conventional Wipers' on the left and 'Interval Wipers' on the right. Both circuits are fed by Fuse 11 (15 Amps) on a circuit hot at all times, plus a feed hot when the ignition switch is in Run or Accessory (referencing page 9 for power distribution). The conventional circuit shows the windshield wiper/washer switch (Off/Low/Hi positions) connected through connectors C501, C502, and C505 to the windshield wiper motor and windshield washer pump motor, grounding at splice S805 and ground G701. The interval circuit adds a 2-speed intermittent switch (Intermittent/Off/Low/High) and a windshield wiper governor module, with connectors C501, C502, C504, C505 and grounds G502 and G701. Wire circuit numbers and color codes are labeled throughout, including 763 o/w, 950 w/bk, 951 gr/bk, 56 bl, 58 w/o, 28 bk/w, 63 r, 296 r, 297 bk/gr, 941 bk/w, 57 bk, and bk/lg. A reader can trace wiper power, switch logic, motor speed wiring, washer pump feed, and ground points for both wiper system variants.
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Frequently asked questions
- What fuse protects the windshield wiper circuit and what is its rating?
- Fuse 11, rated at 15 Amps, protects both the conventional and interval windshield wiper/washer circuits.
- What wire colors connect the wiper switch to the wiper motor?
- Circuits 56 bl (blue), 58 w/o (white/orange), 28 bk/w (black/white), and 63 r (red) run from the wiper/washer switch through connector C502 to the windshield wiper motor.
- What extra component does the interval (intermittent) wiper system use?
- The interval wiper system adds a Windshield Wiper Governor module and a 2-speed intermittent wiper/washer switch, connected through connector C504 and grounded at G502.
- Where does the windshield washer pump motor ground?
- The washer pump motor grounds through black (bk) wires via splice S805 to ground point G701 in both diagrams.
- What wire feeds the washer pump motor?
- Circuit 951 gr/bk (gray/black) runs through connector C505 to the windshield washer pump motor.
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