How Does Brake Controller and 12 Volt Accessory Circuit Activate 2008 Hummer H2

Published 06/02/2022

Question:

Hello. I have a 2008 Hummer H2. It has a round trailer plug, but does not support trailer brakes or interior trailer lights. What plug and play products do you offer to add a brake controller and get power to the interior lights fir this vehicle?

asked by: John M

Expert Reply:

Under the dash there is a brake controller install wiring bundle you can use to install a brake controller like the Brake EVN # TK63VR. This wiring ties into the 7-way at the rear of your vehicle that you mentioned. There is also a wire under the hood that is red and black near the brake booster that needs to connect to the fuse box/relay box to activate it. It has a ring terminal on it and it attaches to the larger terminal on the front of the relay box. You'll need to install a 30 amp fuse as well for this circuit.

For the 12 volt circuit you'll look between the relay box and the fender of the vehicle and attach it to the smaller post of the relay box.

expert reply by: Jameson C