Locating Factory Brake Controller Wiring on 2012 GMC Sierra

Question

Question:

Ive watched the videos, but I cant find the wires that are above the break. They are not there. The manual says they should be there. Instead it seems that I have a hook up, plug, above the emergency break that might be the correct hook up as it has five wires. I cannot find a wire with the correct preconected end. So Im not sure if theses are the correct wires to hook up the trailor break system too. Is this hook up for the factory installed breaking system? And if so how do I connect to it? Thanks .

asked by: Spencer M

1

Helpful Expert Reply:

Your 2012 GMC Sierra is not equipped with a factory brake controller port for a simple plug-in installation, but all the necessary wires are indeed already run to beneath the dash so that it is just a matter of connecting the 4 wires from the brake controller to the factory wires on the truck.

These wires should be on the driver's side in front of the fuse panel to the left of the brake pedal. They will likely be taped to other wiring and you will just need to pull them free. There should be 5 wires and it looks like they will be red, dark blue, light blue, white, and orange. The orange wire will not be used.

The red wire on the truck will connect to the black (12V power) wire on the brake controller. The dark blue truck wire will go to the blue (brake output) wire on the controller. The light blue wire goes to the red wire (brake input) on the controller and the white wire goes to the corresponding white wire (ground).

I have attached an installation video on the 2011 Sierra that you can use for reference, along with an article that will walk you through the process.

expert reply by: Chris R

1

Answer 1

There are a few troubleshooting steps to help you figure out why you have no power. I would start by making sure that there is not any corrosion or debris blocking your connection points. If they are clean or still no power after cleaning, I would…

view full answer...

Answer 2

You can convert a single axle trailer to a tandem axle but it's more extensive than just putting the extra axle on there. The current axle does need to be repositioned for proper tongue weight. You will also need to cut off the current…

view full answer...

Answer 3

The power is going to come from the 7-way connection on your vehicle. This will also power the Curt Echo #C51180. The Echo Smart Control App does not need to be open for the brake controller to operate. The app is only necessary to change the…

view full answer...

Answer 4

If the 12-volt pin on your trailer connector isn't working, you've got a missing or blown fuse or the wiring connection at the fuse box under the hood wasn't finalized. You're looking for a 40 amp fuse, located in…

view full answer...

Answer 5

There are a number of reasons why the brakes on your trailer may not be working. Lets start with the easiest things to check. First, check the vehicle and trailer connectors for corrosion. This can cause a short inside the connector and the brake…

view full answer...

Answer 6

This sounds like the trailer brakes are not receiving the signal from the brake controller when you apply the brakes. I believe what is happening is that you may have a loose, broken, or inaccurate connection on the red wire from the brake…

view full answer...

Answer 7

If you do not have the brake controller already then, I actually recommend going with the Curt Echo Mobile #C51180, for a few reasons. First, it does not require that the 7-Way on the vehicle has the brake output circuit so you would not have to add…

view full answer...

Answer 8

I took a look at the online version of the owner's manual for your 2012 Chevy Silverado and it only listed a couple of fuses for the two non-working trailer light functions you mentioned on the truck; the #3 fuse for Trailer Left Turn/Stop and…

view full answer...

Answer 9

Other than there being an issue with the controller itself, you may want to check the towing fuses to male sure they are all still good. I included a picture of the fuse box under your hood and the fuses you will need to make sure are good, but it is…

view full answer...

Answer 10

Unfortunately, your photo didn't come through, but we get asked this question fairly often. There is a bundle of wires under the brake pedal of your 2012 GMC Sierra that will have an orange wire that should be used to power the third brake light…

view full answer...

Answer 11

I recommend reviewing the installation steps. I have attached a help article on installing a brake controller in a 2007-2013 GMC Sierra for you. This article goes through the installation steps. If the controller is not getting power, I recommend…

view full answer...

Answer 12

DOT really will only care that the breakaway system battery will be capable of holding the trailer brakes fully engaged for at least 15 minutes at any given time. It's wiser to use a dedicated battery for this so that you don't deplete the…

view full answer...

Locating Factory Brake Controller Wiring on 2012 GMC Sierra

Product Page this Question was Asked From

Featured Help Information

Instructions

Miscellaneous Media

Continue Researching