What fuse 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 the master tailgate window switch through a LB/BK wire.

What relays does this alternate tailgate wiring use?

Two SPDT relays, each with a coil and terminals 85, 30, 87a, 87, and 86; one relay grounds at pin 87a/86 side and both are connected to GND.

What does the tailgate latch switch do in this circuit?

The tailgate latch switch (on the T/BK wire) is open when the tailgate is not fully closed, preventing the tailgate power window motor from operating.

What wire colors run to the tailgate window motor?

The tailgate power window motor is fed by a Y/R wire and an R/Y wire coming from the relay circuits through the latch switch.

Home/ Registry/ Ford/ Bronco/ 1992-1996/ “Eddie Bauer”/ Photo supermotors.net/registry/media/1112494

Ford Bronco Tailgate Power Window Relay Wiring Diagram - Alternate Circuit

Color wiring diagram of tailgate power window circuit with two SPDT relays and switches

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Wiring diagram of the tailgate power window circuit showing SPDT relays, master and key switches, and color-coded wires.

AI caption July 2017 · Photo 2520 of 3001

This document is a hand-drawn/annotated alternate wiring diagram for a Ford Bronco tailgate power window circuit, credited to "eighty5eddie" and hosted on SuperMotors.net. It shows a modified circuit using two SPDT relays (each with pins 85, 30, 87a, 87, and 86 and an internal coil) to carry motor current instead of routing it entirely through the switches. Power comes 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 heavy 10-gauge wire run from the battery to the driver's side taillight area to feed the relays directly. The master tailgate window switch (up/down) requires no ground in this scheme and connects through P/LG and PK/LB wires to the relays and to the key-operated tailgate window switch at connector 517 (BK/W and PK/LB wires). The tailgate latch switch (T/BK wire), which is open when the tailgate is not fully closed, interrupts the circuit to the tailgate power window motor, which is fed by Y/R and R/Y wires from the relays. Both relays are grounded (GND). The diagram lets a reader rewire the tailgate window with relays for improved current handling.

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Frequently asked questions

What fuse 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 the master tailgate window switch through a LB/BK wire.
What relays does this alternate tailgate wiring use?: Two SPDT relays, each with a coil and terminals 85, 30, 87a, 87, and 86; one relay grounds at pin 87a/86 side and both are connected to GND.
Where does the heavy power feed come from?: A 10-gauge wire is run from the battery to the driver's side taillight area to supply the relays directly.
What does the tailgate latch switch do in this circuit?: The tailgate latch switch (on the T/BK wire) is open when the tailgate is not fully closed, preventing the tailgate power window motor from operating.
What wire colors run to the tailgate window motor?: The tailgate power window motor is fed by a Y/R wire and an R/Y wire coming from the relay circuits through the latch switch.