Brake Controller Recommendation and Install Recommendation for 2007 Hummer H3

Question:

Using information from these QandAs, I have found my factory wiring under the dash for a brake controller, but havent been able to find where they come out at the rear of the truck. There was no factory hitch or tow package on this truck when I bought it. I was hoping Id find them snubbed off somewhere in the rear as they were up front.

asked by: Andrew G

Expert Reply:

Your 2007 Hummer H3 should have four or five blunt cut wires under the left side of the instrument panel to the left of the steering column. You should see a bundle that contains a red wire with a black stripe, a white wire, light blue wire with a white stripe, a dark blue wire and possibly an orange wire.

The bundle could be above the emergency foot brake, behind the plastic kick panel or above the brake pedal. This bundle of wires is what is used to hook up the electrical lead wires coming off the back of a brake controller. I will include a link to a page to a brake controller help page that has a chart on how to match the wire colors. You may need to cut off the plastic connector at the end of the wires because your vehicle will not use a plug-in style connector.

I have attached two help articles that should help you when installing the brake controller in your vehicle as well as an installation video. The vehicle and brake controller in the video is different, but it should help you locate the wire bundle under the dash and give you an idea how to connect the brake controller.

For a brake controller I would recommend the Prodigy P3 Brake Controller part # 90195. This is our best selling brake controller because of how well it works and how easy it is to setup. This is a proportional brake controller that senses the amount of braking the tow vehicle is applying and applies a proportionate amount to the trailer brakes. This will be the last brake controller you buy. It can easily be transferred to future vehicles as well.

expert reply by: Jameson C