What connector is used for the master (dash) tailgate window switch?

Connector C274, which is gray, with 5 pins.

Which pin on the C274 connector provides power to the tailgate window switch?

Pin 1, circuit 400 (Light Blue/Black), which is hot in ACCY or RUN.

Which pins are grounds on the dash tailgate window switch connector?

Pins 2 and 5, both circuit 57 (Black), are grounds.

What wire is hot when the tailgate window switch is in the UP position?

Pin 3, circuit 404 (Purple/Light Green), is hot in UP.

What wire is hot when the tailgate window switch is in the DOWN position?

Pin 4, circuit 405 (Purple/Light Blue), is hot in DOWN.

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Ford Bronco Master Dash Tailgate Window Switch Wiring - C274 Connector Pinout

Master dash tailgate window switch C274 pinout with color-coded wires and circuit table

Pinout for '87-96 Dash Switch CONNECTOR (harness side) for Tailgate Window
(Looking into the switch, the pins would be reversed.)
IF THE IMAGE IS TOO SMALL, click it.

Pin 2 is normally closed to pin 4, & pin 3 to pin 5. When the switch is operated, either pin 3 or pin 4 is momentarily opened from ground & closed to pin 1 (power).

To bypass the dash switch & test the rest of the circuit for DOWN, turn the key to RUN or ACC, install a jumper (paperclip, etc.) from 3 (P/LG) to either ground (2 or 5 Bk), then install a jumper from 1 to 4. To test UP, jumper 4 to either ground, and 3 to 1. If the motor doesn't spin during both tests, the dash switch is NOT the only fault.

Maximum current draw when glass is moving is 4A @ 14VDC.

See also:
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Owner caption November 2025 · Photo 0 of 5000

This document is a connector pinout diagram for the master (dash-mounted) tailgate window switch, identified as connector C274 (gray). It shows a graphical representation of the 5-pin switch connector with the wire circuits attached to each pin, including wire color codes shown both textually and with color swatches. An accompanying table lists each pin number, its circuit number and wire color, and its function: Pin 1 carries circuit 400 (Light Blue/Black), power that is hot in ACCY or RUN; Pins 2 and 5 carry circuit 57 (Black) grounds; Pin 3 carries circuit 404 (Purple/Light Green), the tailgate window switch UP signal (hot in UP); and Pin 4 carries circuit 405 (Purple/Light Blue), the tailgate window switch DOWN signal (hot in DOWN). Note that Pin 1 shows two 400 (LB/BK) wires in the connector illustration. A reader can use this diagram to identify, test, or repair the wiring at the dash tailgate window switch — for example, verifying power on pin 1 with the key in ACCY or RUN, checking grounds on pins 2 and 5, and confirming output voltage on pins 3 or 4 when the switch is operated. The document itself does not state a year, make, or model; it is watermarked "Steve83."

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Frequently asked questions

What connector is used for the master (dash) tailgate window switch?: Connector C274, which is gray, with 5 pins.
Which pin on the C274 connector provides power to the tailgate window switch?: Pin 1, circuit 400 (Light Blue/Black), which is hot in ACCY or RUN.
Which pins are grounds on the dash tailgate window switch connector?: Pins 2 and 5, both circuit 57 (Black), are grounds.
What wire is hot when the tailgate window switch is in the UP position?: Pin 3, circuit 404 (Purple/Light Green), is hot in UP.
What wire is hot when the tailgate window switch is in the DOWN position?: Pin 4, circuit 405 (Purple/Light Blue), is hot in DOWN.