What fuses power the headlight circuit in this diagram?

Fuse 19 (40A) and Fuse 3 (30A) in the engine compartment fuse box, both hot at all times, with BLK/ORG output wires. The main light switch also contains a 22.5 A circuit breaker.

What wire colors are used for the high and low beams?

High beam is LT GRN/BLK (multi-function switch pin 5) and low beam is RED/BLK (pin 3). Both left and right headlamps receive these colors at their HI and LO terminals.

Where do the headlamps ground?

The left headlamp grounds on a BLK wire at G108, the right headlamp at G101, and the high-beam indicator circuit grounds at G200.

How does the flash-to-pass feature get power?

Fuse 3 (30A) feeds the multi-function switch pin 7 via a DK BLU/ORG wire, powering the flash-to-pass function even with the main light switch off.

What is the DRL jumper shown in the diagram?

A daytime running lamps (DRL) jumper between pins 8 and 1; it receives LT GRN/BLK and outputs GRY/WHT to the high-beam indicator in the instrument cluster through connector C250.

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1994 Ford Bronco Headlight Wiring Diagram - Fuses, Dimmer Switch & Wire Colors

Headlamp wiring diagram showing main light switch, fuse box, DRL, and left/right headlamp circuits

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Wiring diagram of the headlamp circuit including main light switch, fuses, daytime running lamps, and color-coded wiring.

AI caption October 2013 · Photo 885 of 3001

This document is a headlight circuit wiring diagram (diagram number 74877) uploaded for a 1994 Ford Bronco. It shows power originating from two hot-at-all-times sources in the engine compartment fuse box: Fuse 19 (40A) and Fuse 3 (30A), both leaving on BLK/ORG wires. Fuse 19 feeds the main light switch, which contains a 22.5 A circuit breaker and OFF/PARK/HEAD positions; terminal B1 receives BLK/ORG and terminal H outputs RED/YEL. Fuse 3 feeds the multi-function switch pin 7 on a DK BLU/ORG wire for the flash-to-pass function, while RED/YEL feeds pin 2 for the dimmer (HI/LO/PASS) function. Switch outputs are LT GRN/BLK (pin 5, high beam) and RED/BLK (pin 3, low beam). The LT GRN/BLK high-beam circuit also passes through a daytime running lamps (DRL) jumper (pins 8 to 1, exiting as GRY/WHT) to the high-beam indicator in the instrument cluster via connector C250, grounding at G200. Both left and right headlamps receive LT GRN/BLK (HI) and RED/BLK (LO) feeds and ground on BLK wires at G108 (left) and G101 (right). The diagram documents wire colors, fuse ratings, connector pins, and ground locations for headlight troubleshooting.

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Frequently asked questions

What fuses power the headlight circuit in this diagram?: Fuse 19 (40A) and Fuse 3 (30A) in the engine compartment fuse box, both hot at all times, with BLK/ORG output wires. The main light switch also contains a 22.5 A circuit breaker.
What wire colors are used for the high and low beams?: High beam is LT GRN/BLK (multi-function switch pin 5) and low beam is RED/BLK (pin 3). Both left and right headlamps receive these colors at their HI and LO terminals.
Where do the headlamps ground?: The left headlamp grounds on a BLK wire at G108, the right headlamp at G101, and the high-beam indicator circuit grounds at G200.
How does the flash-to-pass feature get power?: Fuse 3 (30A) feeds the multi-function switch pin 7 via a DK BLU/ORG wire, powering the flash-to-pass function even with the main light switch off.
What is the DRL jumper shown in the diagram?: A daytime running lamps (DRL) jumper between pins 8 and 1; it receives LT GRN/BLK and outputs GRY/WHT to the high-beam indicator in the instrument cluster through connector C250.