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1979 Ford Bronco Wiring Diagram - Wiper/Washer & Panel Illumination Circuits

Haynes 1979 Bronco wiring schematic (continued) showing display, sensor and connector circuits with wire-color and gauge identification.

AI caption · Photo 107 of 126

This is page 270 of a Haynes repair manual containing two continuation sheets of the factory wiring diagram for the 1979 Ford Bronco (Figs. 10.147 and 10.148). The upper diagram (Fig. 10.147) covers the windshield wiper and washer circuits: power distribution feeds from fuse panel positions F-2 and F-11 and splice S-303, the W/S/W washer switch (2-speed intermittent, positions P-OFF, I-INTERM, L-LOW, H-HIGH), the W/S wiper governor, dual W/S wiper motors, and the W/S washer pump motor, with connectors C-501, C-502, C-504, C-505 and ground G-502. Wire circuits shown include 19 BL-R, 950 W-BK, 763 O-W, 296 R, 297 BK-GR, 941 BK-W, 56 BL, 57 BK, 58 W-O, 28 BK-W, 63 R, and 951 GR-BK. The lower diagram (Fig. 10.148) covers instrument panel illumination on circuit 19 BL-R: the headlamp switch/washer controls illumination lamp, cluster illumination lamps, A/C & heater controls illumination, I/P ash tray lamp, PRNDL (column) lamp, and radio receiver options (AM, AM/FM/MPX, AM/FM monaural, digital AM with clock), grounding through 57 BK wires to splice S-805, with connectors C-208, C-601, C-513, C-305, C-506, C-713 and splice S-806. A Mitchell International, San Diego, CA credit appears at the bottom.

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Frequently asked questions

What wire color feeds the instrument panel illumination lamps on a 1979 Bronco?
Circuit 19 BL-R (blue-red) feeds the illumination lamps, coming from fuse panel position F-2 in the power distribution circuit.
What positions does the 1979 Bronco windshield wiper/washer switch have?
The 2-speed intermittent W/S/W washer switch has positions P-OFF, I-INTERM (intermittent), L-LOW, and H-HIGH.
Which connectors are used in the 1979 Bronco wiper circuit?
The diagram shows connectors C-501, C-502, C-504, and C-505, plus ground G-502 at the wiper governor.
How do the illumination and radio circuits ground on the 1979 Bronco?
They ground through 57 BK (black) wires that join at splice S-805 (labeled CHARGE, START, RUN, SPLICE S-805).
What radio options are shown in the 1979 Bronco illumination diagram?
AM radio receiver, AM/FM/MPX radio receiver, AM/FM monaural radio receiver, and a digital AM radio with clock receiver, all fed by 19 BL-R through connector C-506.

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