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Ford Bronco Tailgate Power Window Relay Wiring Diagram - Alternate SPDT Setup
Reference · 1992-1996 BroncoAll 411 wiring diagrams
Wiring diagram of a power tailgate window circuit with master switch, SPDT relays, and color-coded wires.
Part of 1992-1996 Ford Bronco Wiring Diagrams
This document is a hand-modified (alternate) wiring diagram for the power tailgate window circuit of a Ford Bronco, credited to community member 'eighty5eddie' and hosted on SuperMotors.net. It shows an upgraded arrangement using two SPDT relays (with pins labeled 85, 30, 87a, 87, and 86, and internal coils shown) to carry the heavy motor current instead of routing it through the switches. Power originates from fuse panel position 14 (a 20A circuit breaker, hot in ACC or RUN) via a LB/BK wire to the master tailgate window switch, plus a dedicated 10-gauge wire run from the battery to the driver's side taillight area to feed the relays. Wire color codes shown include P/LG, PK/LB, BK/W, T/BK, Y/R, and R/Y, with connector 517 identified. The circuit includes the master tailgate window switch (noted 'no ground needed'), the key-operated tailgate window switch, a tailgate latch switch (open when the tailgate is not fully closed), and the tailgate power window motor. Both relays are grounded locally. A reader can learn how to wire relays into the tailgate window circuit, which relay pins connect where, the wire colors involved, and the fuse/breaker rating protecting the circuit.
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Frequently asked questions
- What fuse position and rating powers the tailgate window circuit in this diagram?
- Fuse panel position 14, a 20A circuit breaker (c.b.), which is hot in ACC or RUN, feeding a LB/BK wire to the master tailgate window switch.
- What relays are used in this alternate tailgate wiring setup?
- Two SPDT relays with standard pins 85, 30, 87a, 87, and 86; one is mounted near the master switch circuit and one near the tailgate switch circuit, both with pin 87a/ground connections to GND.
- Where does the main power feed for the relays come from?
- A 10-gauge wire run from the battery to the driver's side taillight area supplies the relays.
- What does the tailgate latch switch do in this circuit?
- It is wired in the motor circuit (T/BK and R/Y wires) and is open when the tailgate is not fully closed, preventing window operation unless the tailgate is fully closed.
- What wire colors are used between the switches and relays?
- LB/BK from the fuse panel, P/LG and PK/LB between the master switch and relays/tailgate switch, BK/W through connector 517, T/BK to the latch switch, and Y/R and R/Y to the tailgate power window motor.
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