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Ford Bronco Tailgate Window Relay Mod Wiring Diagram - SPDT Relay Pinout
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Reference · 1992-1996 BroncoAll 411 wiring diagrams
User-made tailgate/taillight wiring diagram (eighty5eddie) using two SPDT relays for tailgate window up/down and tailgate-power interlock, photographed with wire and crimp-connector supplies.
Part of 1992-1996 Ford Bronco Wiring Diagrams
This photo documents a tailgate power window relay modification project, centered on a printed wiring diagram credited to "eighty5eddie" (watermarked SuperMotors.net). The diagram shows a circuit fed from the fuse panel (fuse position 14, 20A circuit breaker, hot in ACC or RUN) through an LB/BK wire to the master tailgate window switch, then via P/LG and PK/LB wires to two SPDT relays (terminals 85, 30, 87a, 87, 86). Power for the relays comes from a 10-gauge wire run to the driver's side taillight area. The circuit continues through the key-operated tailgate window switch, the tailgate latch switch (open when the tailgate is not fully closed), and finally the tailgate power window motor, with wire colors such as BK/W, Y/R, and R/Y noted. A handwritten note gives the relay socket pigtail color code: 30=blue, 85=black, 86=white, 87=yellow, 87A=red, with a pin-layout sketch. Also pictured are the physical parts used: a 5-pin relay with wired socket, Handypack HP2030 12-10 gauge ring terminals, Storehouse item 66595 16-22 gauge watertight heat-shrink butt connectors, Star brite Liquid Electrical Tape (4 fl oz), red heat-shrink tubing, and a tailgate window bracket/track. A reader can learn how to wire dual relays to protect and power a Ford Bronco tailgate window circuit.
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Frequently asked questions
- What relay terminal colors are used in this tailgate window relay mod?
- Per the handwritten note: pin 30 = blue, 85 = black, 86 = white, 87 = yellow, 87A = red.
- Where does the tailgate window circuit get its power in this diagram?
- From the fuse panel, fuse position 14 with a 20A circuit breaker (hot in ACC or RUN) via an LB/BK wire, plus a 10-gauge feed wire run to the driver's side taillight area powering the relays.
- What type of relays are used in the modification?
- Two SPDT relays with terminals 85, 30, 87a, 87 (and 86 shown on the lower relay), one for each direction of the tailgate window motor.
- What does the tailgate latch switch do in this circuit?
- The diagram notes the tailgate latch switch is open when the tailgate is not fully closed, so the power window circuit is interrupted unless the tailgate is latched.
- What connectors and supplies are shown for the install?
- Handypack HP2030 ring terminals (12-10 gauge, 5/16" stud, 9 pcs), Storehouse item 66595 16-22 gauge watertight heat-shrink butt connectors (10 pc), and Star brite Liquid Electrical Tape (4 fl oz).
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