What fuses and amp ratings are shown on this wiring diagram?

Four fuses are shown fed from the buss bar: F-2 is 14 amp, F-3 is 4 amp, F-4 is 15 amp, and F-5 is 20 amp.

What wire color feeds the cluster illumination lamps?

The cluster illumination lamps, along with the heater control, headlamp/hazard/wiper switch, and PRNDL illumination lamps, are fed by circuit 19 BL-R (blue-red) through the 4-amp F-3 fuse.

What happens when the windshield washer switch is pushed to wash?

Per Note A on the diagram, when the windshield washer switch is pushed to the wash position, the windshield wiper switch is cammed to its 'LO' position.

What wire colors run from the dimmer switch to the headlamps?

From the headlamp dimmer switch, circuit 13 R-BK and 12 GR-BK run through splices to the left and right headlamps via connectors C-402 and C-403; 34 GR-BK feeds the hi-beam indicator lamp. Grounds are 57 BK.

Which circuits does this diagram page cover?

It covers headlamps, marker lamps, park/turn signal lamps, turn and emergency signal switch, T/S and emergency flashers, stoplamp switch, windshield wiper/washer, backup lamps, AM radio, dome/map lamps, panel illumination lamps, cigar lighter, and an immersion heater.

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1974 Ford Bronco Wiring Diagram - Headlights, Turn Signals, Wiper & Fuses

Vehicle wiring diagram showing headlight, switch, and lamp circuits

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Part of 1966-1977 Ford Bronco Wiring Diagrams

AI caption April 2006 · Photo 76 of 206

This document is one page of a multi-page factory-style wiring diagram, uploaded as "74wiring2.jpg" for a 1974 Ford Bronco. The schematic covers primarily lighting and accessory circuits: the headlamp switch, headlamp dimmer switch, left and right headlamps, front marker lamps, park/turn signal lamps, turn and emergency signal switch, turn signal (T/S) flasher, emergency warning flasher, stoplamp switch, and hi-beam and turn signal indicator lamps. It also shows the windshield wiper and washer switch, wiper motor and washer pump motor, backup lamp switch and backup lamps, AM radio and speaker, dome and map lamps, cluster/heater control/PRNDL illumination lamps, cigar lighter, and an immersion heater with an A/C outlet feed. Fuses shown include F-2 (14 amp), F-3 (4 amp), F-4 (15 amp), and F-5 (20 amp), all fed from a buss bar. Wire circuits are labeled with number and color codes (e.g., 19 BL-R, 53 BK-BL, 285 BR, 57 BK ground), and connectors (C-301 through C-415), splices (S-202, S-204, S-301, S-401), and grounds (G-301, G-401, etc.) are called out. A note explains that pushing the washer switch to the wash position cams the wiper switch to its LO position. The page itself is undated.

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Frequently asked questions

What fuses and amp ratings are shown on this wiring diagram?: Four fuses are shown fed from the buss bar: F-2 is 14 amp, F-3 is 4 amp, F-4 is 15 amp, and F-5 is 20 amp.
What wire color feeds the cluster illumination lamps?: The cluster illumination lamps, along with the heater control, headlamp/hazard/wiper switch, and PRNDL illumination lamps, are fed by circuit 19 BL-R (blue-red) through the 4-amp F-3 fuse.
What happens when the windshield washer switch is pushed to wash?: Per Note A on the diagram, when the windshield washer switch is pushed to the wash position, the windshield wiper switch is cammed to its 'LO' position.
What wire colors run from the dimmer switch to the headlamps?: From the headlamp dimmer switch, circuit 13 R-BK and 12 GR-BK run through splices to the left and right headlamps via connectors C-402 and C-403; 34 GR-BK feeds the hi-beam indicator lamp. Grounds are 57 BK.
Which circuits does this diagram page cover?: It covers headlamps, marker lamps, park/turn signal lamps, turn and emergency signal switch, T/S and emergency flashers, stoplamp switch, windshield wiper/washer, backup lamps, AM radio, dome/map lamps, panel illumination lamps, cigar lighter, and an immersion heater.