Trailer Wiring Harness
If you have the optional trailering package, your vehicle
will have an eight-wire harness, including the center
high-mounted stoplamp battery feed wire. The harness
is stored on the passenger’s side of the vehicle near
the rear wheel well. This harness has a
30 amp battery
feed wire and no connector, and should be wired by
a qualified electrical technician. After choosing an
aftermarket trailer mating connector pair, have the
technician attach one connector to the eight-wire trailer
harness and the other connector to the wiring harness
on the trailer. Be sure the wiring harness on the trailer
is
taped or strapped to the trailer’s frame rail and leave
it loose enough
so the wiring doesn’t bend or break, but
not
so loose that it drags on the ground. The eight-wire
harness must be routed out of your vehicle between
the rear door and the floor, with enough of the harness
left on both sides
so that the trailer or the body won’t
pull it. If you do not have the optional trailering
package, your vehicle will still have a trailering harness.
The harness is located near the passenger’s side
rear wheel well. It consists
of six wires that may be
used by after-market trailer hitch installers. The
technician can use the following color code chart
when connecting the wiring harness to your trailer.
e
e
Brown: Rear lamps.
Yellow: Left stoplamp and turn signal.
Dark Green: Right stoplamp and turn signal.
White (Heavy Gage): Ground.
Light Green: Back-up lamps.
White (Light Gage): Center High-Mounted Stoplamp.
Blue: Auxiliary circuit (eight-wire harness only).
Orange: Fused auxiliary (eight-wire harness only).
Store the harness in its original place. Wrap the
harness together and tie it neatly
so it won’t
be damaged.
4-4 1
Fuse/Circuit Usage
Breaker
DIODE-I Air Conditioning
Blank Not Used
Blank
Not Used
Blank Not Used
LIGHTING Courtesy Fuse, Power Adjust
Mirrors Fuse, Truck Body Control
Battery Fuse
Power Accessory Circuit Breaker,
Stop/Hazard Fuse, Auxiliary Power
Fuse, Cigarette Lighter Fuse, Radio
Battery Fuse
BATT
Fuse/Circuit
Breaker
IGN A
IGN
B
ABS
Blank RAP
HTD MIRI
RR DEFOG
Usage
Starter Relay, Ignition Switch
Ignition Switch
Electronic Brake Control Module
Not Used Radio Accessory, Power Windows
Rear Window Defogger,
Climate Control Head
5-98
