2003 Chevy Trail Blazer, GMC Envoy
"Standard" Wire colors to the controller:
- Tekonsha and others
- Battery Positive to controller
- Negative Ground for Controller
- Brake feed from controller to Trailer plug at back of truck
- tap into truck Brake light switch signal to tell controller to apply brakes
Remember, the above colors are just a GUIDE. your colors may be different, read the instructions!
Drop Panel under dash to locate tapped up wires
On the Tekonsha Controllers I sell, The power wire is Black, it would hook to the heavy Orange wire. The Heavy Blue wire hooks to the Heavy blue wire. The small Blue wire is the brake light switch signal, it would hook to the small red wire on the controller. The black wire is ground, and hooks to the white wire on the controller.