TRAILER TOW WIRING
DESCRIPTION
Vehicles equipped with an optional factory-installed
trailer towing package have a rear body wire harness
that includes a trailer tow wiring take out (2) secured
beneath the rear underbody with retainer clips (1 and
3). A molded connector (4) at the end of the take out
is connected to a heavy duty, sealed, 7-pin trailer tow
connector located on a bracket on the trailer hitch
receiver. The rear body harness includes a second
take out with a trailer tow relay connector bank and
the four trailer tow relays that isolate the right turn sig-
nal, left turn signal, and brake lamp circuits of the
vehicle from the electrical system of the trailer. The
fourth relay in the connector bank provides a fused
ignition switch output (run) source of battery voltage to
the trailer tow connector through a trailer tow relay
output circuit.
The package also includes an adapter harness (stored beneath the left rear seat cushion of the vehicle when it is
shipped from the factory) that adapts the 7-pin trailer tow connector to a standard, light-duty, 4-pin trailer tow con-
nector. Refer to the appropriate wiring information.
8L - 122
LAMPS/LIGHTING - EXTERIOR
KJ