Hummer 2009 H3 Owner's Manual page 234

4-52 Driving Your Vehicle
The trailer towing harness contains
the following seven trailer circuits:
•
Yellow: Left Stop/Turn Signal
•
Dark Green: Right Stop/Turn
Signal
•
Brown: Taillamps
•
White: Ground
•
Light Green: Back-up Lamps
•
Red: Battery Feed
•
Dark Blue: Trailer Brake
If charging a remote (non-vehicle)
battery, turn on the headlamps
to boost the vehicle system voltage
to properly charge the battery.
Four-Wire Harness Adapter
If towing a light-duty trailer with a
standard four-way, flat pin
connector, an adapter is available
from your dealer/retailer.
Hold the adapter with the tab
pointing up.
Connect the adapter to the
seven-pin universal heavy-duty
trailer connector attached to
the bracket on the hitch platform.
The flip cap on the vehicle's harness
locks onto the tab and helps hold
the adapter in place. Plug the
four-way pin connector onto the
adapter.