What is connector C279 on the rear window defrost control?

C279 is the natural-colored 5-pin connector for the Rear Window Defrost Control, with pins 1-5 carrying circuits 186, 185, 8, 57, and 19.

Which pin powers the rear window defrost grid?

Pin 1, circuit 186 with a brown/light blue (BR/LB) wire, provides power for the Rear Window Defrost Grid.

Which wire is hot at all times at the defrost control connector?

Pin 2, circuit 185 with a black (BK) wire, is power that is hot at all times.

Where is the ground on the rear defrost control connector?

Pin 4, circuit 57 with a black (BK) wire, is the ground.

What circuit provides the defrost switch illumination?

Pin 5, circuit 19 with a light blue/red (LB/R) wire, provides switch illumination.

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1996 Ford Bronco Rear Window Defrost Control C279 Connector Pinout Diagram

Rear window defrost control connector C279 pinout with wire colors and circuit function table

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Wiring connector pinout for the rear window defrost control (C279) listing pin numbers, wire colors and circuit functions.

AI caption July 2011 · Photo 142 of 224

This document is a connector pinout diagram for connector C279 (natural color), the Rear Window Defrost Control connector, filed by the uploader for a 1996 Ford Bronco. The top portion shows a face view of the 5-pin connector with circuit numbers and wire colors called out for each cavity: circuit 186 (brown/light blue), 185 (black), 8 (orange/yellow), 57 (black), and 19 (light blue/red). Below the drawing, a table lists each pin, its circuit number and wire color, and the circuit function: Pin 1 is circuit 186 (BR/LB), power for the rear window defrost grid; Pin 2 is circuit 185 (BK), power hot at all times; Pin 3 is circuit 8 (O/Y), power hot in run; Pin 4 is circuit 57 (BK), ground; and Pin 5 is circuit 19 (LB/R), switch illumination. A reader can use this diagram to identify wires at the rear window defroster control switch, verify power, ground, and illumination circuits, and troubleshoot a non-working rear defrost grid or switch backlight. The document itself carries no printed year or model designation.

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Frequently asked questions

What is connector C279 on the rear window defrost control?: C279 is the natural-colored 5-pin connector for the Rear Window Defrost Control, with pins 1-5 carrying circuits 186, 185, 8, 57, and 19.
Which pin powers the rear window defrost grid?: Pin 1, circuit 186 with a brown/light blue (BR/LB) wire, provides power for the Rear Window Defrost Grid.
Which wire is hot at all times at the defrost control connector?: Pin 2, circuit 185 with a black (BK) wire, is power that is hot at all times.
Where is the ground on the rear defrost control connector?: Pin 4, circuit 57 with a black (BK) wire, is the ground.
What circuit provides the defrost switch illumination?: Pin 5, circuit 19 with a light blue/red (LB/R) wire, provides switch illumination.