2005 BUICK RAINIER wiring harness

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 qualied service center.
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Headlamps, Front Turn Signal,
Sidemarker, and Parking Lamps
To replace a bulb, do the following:
1. Open the hood. SeeHood Release on page 5-10
for more information.
2. Remove the grille by grasping and pulling it
forward.
3. Lift the inner quick release clips.
4. Pull the headlamp assembly away from the vehicle.
5. Remove the cover from the headlamp bulb.
6. Disconnect the wiring harness.
7. Remove the bulb socket by turning it
counterclockwise. Pull the bulb from the socket.
8. Replace the bulb.
9. Reinstall by reversing Steps 1 through 6.
Taillamps and Turn Signal Lamps
To replace a taillamp or turn signal bulb, do the
following:
1. Open the liftgate. SeeLiftgate/Liftglass on
page 2-13for more information.
2. Remove the two
screws from the
taillamp assembly.
3. Pull the taillamp assembly away from the vehicle.
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4. Unclip the wiring harness (A) and remove the
three socket retaining screws (B).
5. Remove the socket by releasing the retaining tabs.
6. Holding the socket, pull the bulb to release it
from the socket.
7. Reinstall by reversing Steps 1 through 6.
Replacement Bulbs
Exterior Lamp Bulb Number
Front Parking and Sidemarker
Lamp194
Front Turn Signal Lamp 3757 A
Halogen Headlamps
High-Beam 9005 HB3
Low-Beam 9006 HB4
Rear Turn Signal and Taillamps 3057
For replacement bulbs not listed here, contact your
dealer.
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