Brake Controller Installation in 2006 GMC Sierra Pickup
Published 12/13/2017
Question:
I just installed brake controller plugged to center panel but not getting power has never had brake controller. I do have 7 pin plug on bumper that has been used to pull trailer with no electric brakes
asked by: Jeff
Expert Reply:
When installing a trailer brake controller in a 2006 GMC Sierra that has a factory 7-way you will both plug in the controller at the under-dash port using the brand-specific wiring adapter AND make some connections under the hood at the power distribution box. For instance, to install the Prodigy P3 # 90195 you would use wiring adapter # 3015-P.
I linked an article that covers this process in detail along with photos to help you. One of the two wiring connections to be made provides power to the trailer brake controller; the other provides for 12V auxiliary trailer power at the 7-way. Fuses may also be necessary if not already present. The article explains all required steps.
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