No power to New Trailer Brake Controller Install on a 2007 GMC Sierra Classic

Question:

I bought a 51110 and a custom harness 51352. Plugged it into power dist. socket under dash, second from left. No power to controller. Do I have to connect anything under the hood at the fuse block to power it ? There is a post on the right side closest to the driver and a unterminated blue wire nearby. Other post has a ring connecter attached. 7 way brake lights, turn signal work to the trailer. Not sure if Im getting power to the brakes. Please help. Thanks.

asked by: Nick

Expert Reply:

You will likely have to make at least one connection under the hood of your 2007 GMC Sierra Classic to power the brake controller. You may also need a fuse. I have included a link to the right that shows the connections that you will need to make under the hood to make everything fully functional.

expert reply by: Michael H