Ford Bronco AutoLamp Auto Headlights Wiring Diagram - Headlight Switch & Relays
Reference · 1992-1996 BroncoAll 411 wiring diagrams
Wiring diagram showing headlight and parking-lamp relays with a multi-pin connector and color-coded leads to exterior, courtesy and dome lamps.
Part of 1992-1996 Ford Bronco Wiring Diagrams
This document is a hand-drawn style wiring diagram for adding automatic headlights (AutoLamp) functionality, apparently to a Ford Bronco headlight circuit. It centers on the factory headlight switch connector, labeling each pin with Ford circuit numbers and wire colors: 137 (Y/BK) hot in ACC or RUN, 484 (O/BK) to the radio harness, 38 (BK/O) always hot from the fuse box, 195 (T/W) always hot, 14 (BR) to exterior lamps, 54 (LG/Y) to courtesy lamps, 55 (BK/PK) to dome lamps, 294 (W/LB) to the cluster dimmer circuit, and 15 (R/Y) to the multifunction switch (MFS) and headlights (blue/orange on MFS). The diagram shows an AutoLamp Mirror module with a white/pink output wire from the mirror driving two added relays, a Parking Light Relay tapped to the 14 (BR) splice for parking lamps, and a Headlight Relay feeding the 15 (R/Y) headlight circuit, with both relays grounded to circuit 57 (BK). A reader can learn the headlight switch pinout wire colors/circuit numbers and how to wire relays triggered by an auto-dimming AutoLamp mirror to automatically activate parking lamps and headlights.
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Frequently asked questions
- What wire color and circuit number feed the headlights from the headlight switch?
- Circuit 15 (R/Y: red/yellow), which goes to the MFS (multifunction switch) and to the headlights, connecting to the blue/orange wire on the MFS.
- Which headlight switch wires are always hot?
- Circuit 38 (BK/O), which connects to the fuse box, and circuit 195 (T/W) are both labeled Always Hot.
- What triggers the parking light and headlight relays in this AutoLamp setup?
- A white/pink wire from the AutoLamp mirror module triggers both the Parking Light Relay and the Headlight Relay.
- Where do the added relays connect for parking lamps?
- The Parking Light Relay connects to a splice in circuit 14 (BR: brown), the exterior/parking lamps circuit.
- How are the relays grounded?
- Both relays ground to circuit 57 (BK: black).
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