Buick 2007 Rainier User Manual
Page 352
Trailer Wiring Harness
Your vehicle is equipped with a seven-wire trailer
towing harness. This harness has a seven-pin
universal heavy-duty trailer connector (if equipped
with the trailering package) that is attached to a
bracket on the hitch platform. If your vehicle is not
equipped with the heavy-duty trailer connector,
you may purchase one from your dealer.
The seven-wire harness contains the following
trailer circuits:
•
Yellow: Left Stop/Turn Signal
•
Dark Green: Right Stop/Turn Signal
•
Brown: Running Lamps
•
White: Ground
•
Light Green: Back-up Lamps
•
Dark Blue: Electric Brakes
•
Red: Battery Feed (The chassis wiring ring
terminal must be fastened to a stud on the
underhood electrical center before the
trailer feed will become active.)
If you need to tow a light-duty trailer with a standard
four-way round pin connector, an adapter connector
is available from your dealer.
If you are charging a remote (non-vehicle) battery,
turn on the headlamps to boost the vehicle
system voltage and properly charge the battery.
Your vehicle is also equipped with wiring for an
electric trailer brake controller. These wires are
located inside the vehicle on the driver’s side under
the instrument panel. These wires should be
connected to an electric trailer brake controller by
your dealer or a qualified service center.
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