Trailer Wiring
Harness
Your vehicle may have either a 5-wire or 7-wire harness.
The light duty trailer wiring is a 5-wire harness assembly taped and bundled
at the left corner of the vehicle interior, next to the endgate. The harness has
no connector, and you should have a qualified service person wire your
harness for you. It must be routed out of your vehicle and attached
so
that
the trailer or the body won’t pull it.
The heavy duty trailer wiring is a 7-wire harness assembly consisting of a
5-wire harness and a 2-wire harness taped together and stored under the
vehicle, along the rear frame crossmember. It has a 30-amp feed wire with
an inline fuse located by the junction block. See “Fuses and Circuit
Breakers”
in
the
Index.
Both the 5-wire harness and the 2-wire harness have no connector and
should be wired by a qualified service person. Attach the harness to the
trailer, then tape or strap
it
to your vehicle’s frame rail. Be sure you leave it
loose enough
so
the wiring doesn’t bend or break, but not
so
loose that
it
drags on the ground.
Store the harness in its original place. Wrap the harness together and tie
it
neatly
so
it won’t be damaged.
2-80
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