Buick 2005 Rainier - Manuel (Page 303)

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 that is attached to a bracket
on the hitch platform.
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.
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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