Parts Needed to Install a Brake Controller on a Chevy Colorado  

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A plug-in brake controller wiring harness is not available for the 2005 Chevy Colorado. The vehicle requires a hardwire method to install a brake controller using a 4-Way trailer connector, if needed, # 118301, and a 4 and 7 Way Installation Kit, # ETBC7.

If your truck already has a factory installed 7-Way, you will still need to do some hardwiring. You will need brake controller installation kit # 5506. With the included wire, you will connect the white wire in the install kit to the blue wire on the brake controller, route it through the firewall, and back to the 7-Way avoiding areas that may pinch or burn the wire.

At the 7-Way, connect the wire to the back of the controller in the 7 oclock position. If any other wire is there, remove it and tape it up. You should have enough wire from the duplex cable included in the kit to make the remaining connections.

Attach a length of wire to the white wire of the brake controller, and a separate length of wire to the black wire of the brake controller. The wire will need to be long enough to be routed through the firewall and reach the battery. The white wire will connect to the negative battery terminal. The black wire will go first to the 30 amp circuit breaker and then to the positive battery terminal.

The last connection is the red wire on the brake controller. Using circuit tester # PTW2993, find the wire on the brake switch above the brake pedal that shows a signal only when the brake pedal is pressed. Attach the red wire to this wire.

I have included a link to an FAQ and video that show the installation of an ETBC7.

expert reply by: Michael H

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