Trailer Wiring Harness - Chevrolet Express 2004 Owner's Manual

Trailer Wiring Harness

The optional heavy-duty trailer wiring package includes
a seven-wire harness assembly at the rear of the
vehicle and a four-wire harness assembly under the left
hand side of the instrument panel. The seven-wire
harness assembly is taped together and located in a
frame pocket at the driver side rear left corner of
the frame. The seven-wire harness includes a 30-amp
feed wire. Both harnesses come without connectors and
should be wired by a qualified electrical technician.
The technician can use the following color code chart
when connecting the wiring harness to your trailer
and trailer brake controller.
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Seven-Wire Harness
•
Light Green: Back-up lamps
•
Brown: Parking lamps
•
Yellow: Left stoplamp and turn signal
•
Dark Green: Right stoplamp and turn signal
•
Dark Blue: Use for electric trailer brakes
•
Orange: Trailer accessory
•
White (heavy gage): Ground wire
Four-Wire Harness (Trailer Brake Controller)
•
Black: Ground
•
Red/White Stripe: Fused Battery
•
Dark Blue: Trailer Brake Feed
•
Light Blue: Fused Stop/CHMSL