Chevrolet 2008 TrailBlazer Owner's Manual page 298

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.
Your vehicle may be equipped with a four-pin trailer
towing harness. This harness has a four-pin trailer
connector that contains the following trailer circuits:
•
Yellow: Left Stop/Turn Signal
•
Dark Green: Right Stop/Turn Signal
•
Brown: Running Lamps
•
White: Ground
4-60
This harness also contains the following trailer circuits
that are not connected to the four-pin trailer connector:
•
Light Green: Back-Up Lamps
•
Dark Blue: Electric Brakes
•
Red: Battery Feed
If your vehicle is a TrailBlazer SS, you were provided with
a trailer wiring harness extension, and instructions for
installing this extension, when your vehicle was delivered.
This extension will allow your vehicle's trailer wiring
harness to be more easily accessible. There is a four-way
connector on the harness. A seven-way adapter plug is
also included in case your trailer requires it.