Brake Controller Issues - SOLVED

[Marada Man]

Hello everyone. I have a 2009 GMC Yukon Denali. I took it to a reputable trailer and hitch installation shop and they told me that there's an issue with the brake wire coming from the truck that's used to install a brake controller. As soon as the ignition is switched to the ON position, it sends power to that wire and it's not supposed to. If they hook up the brake controller, it would be constantly engaged. Anyone else have this issue before or know of a possible fix? They offered me a WiFi brake controller but I'm not to keen on that idea.

Thanks in advance. Cheers!

 

[PG01]

Hello everyone. I have a 2009 GMC Yukon Denali. I took it to a reputable trailer and hitch installation shop and they told me that there's an issue with the brake wire coming from the truck that's used to install a brake controller. As soon as the ignition is switched to the ON position, it sends power to that wire and it's not supposed to. If they hook up the brake controller, it would be constantly engaged. Anyone else have this issue before or know of a possible fix? They offered me a WiFi brake controller but I'm not to keen on that idea.

Thanks in advance. Cheers!

Did they touch the wires under the hood? 2 red black wires bundled and not connected....one near the fender/ fuse box and the other under the master cylinder

 

[Marada Man]

Did they touch the wires under the hood? 2 red black wires bundled and not connected....

I couldn't tell you. I can definitely ask them.

 

[PG01]

I couldn't tell you. I can definitely ask them.

If you have no factory brake controller you need to hook up the wires under hood. They may have put the wrong wire on the wrong post... I don’t know how because they are sized accordingly...

 

[PG01]

1 wire is for power to the aftermarket controller the Other is for battery charging on the trailer...They are both red/black and taped and left bundled for future use. My truck has a factory controller so I already hd a wire hooked up but I still had 2 sept wires bundled and taped so I only needed to hook 1 up. They have ring terminals on them and only fit 1 post on the fuse box or the other... see what they did and report back

 

[PG01]

This will give you an idea

 

[Marada Man]

1 wire is for power to the aftermarket controller the Other is for battery charging on the trailer...They are both red/black and taped and left bundled for future use. My truck has a factory controller so I already hd a wire hooked up but I still had 2 sept wires bundled and taped so I only needed to hook 1 up. They have ring terminals on them and only fit 1 post on the fuse box or the other... see what they did and report back

Will do. I appreciate your input, thank you.

 

[Fless]

If you have no factory brake controller you need to hook up the wires under hood. They may have put the wrong wire on the wrong post... I don’t know how because they are sized accordingly...

This is what I was thinking may have happened. They may have connected the brake wire to the auxiliary power stud.

 

[Marada Man]

Turns out that it was all due to a faulty brake switch. All good now.

Shout out to the folks who chimed in and gave your input. Much appreciated.

 

[89Suburban]

Turns out that it was all due to a faulty brake switch. All good now.

Shout out to the folks who chimed in and gave your input. Much appreciated.

Thanks for reporting back.

 

[swathdiver]

Turns out that it was all due to a faulty brake switch. All good now.

Shout out to the folks who chimed in and gave your input. Much appreciated.

Did you notice if your cruise control was out too? When that switch goes, the cruise control doesn't work. What are you hauling?

 

[Marada Man]

Did you notice if your cruise control was out too? When that switch goes, the cruise control doesn't work. What are you hauling?

To be honest, I can't even remember the last time I used the cruise control. The mechanic also told me the same thing, a faulty brake switch will cause your cruise control not to work as well.

We just picked up a travel trailer that's about 4800 lbs. dry so I definitely needed a brake controller.

 

[swathdiver]

To be honest, I can't even remember the last time I used the cruise control. The mechanic also told me the same thing, a faulty brake switch will cause your cruise control not to work as well.

We just picked up a travel trailer that's about 4800 lbs. dry so I definitely needed a brake controller.

Which weight distribution hitch will you be using?

 

[smokymtn65]

Interested in this, mine works part of the time. The brakes will stay on.(light lights up and trailer brakes apply) without foot on the brake. If i tap pedal it will turn off. However few minutes later will be back on. When this happens the brake lights are not on.. I thought it was a bad controller and changed it, new one did the same thing.

 

[rustycrocker]

On my 2003 Avalanche, the brake controller plugs into the relay panel under the dash. According to everything I have read, this is not an option for the 2007 Yukon. I have read that you have to find a bundle of wires under the dash and hard-wire it. I cannot locate this bundle of wires. Any help is appreciated.

BTW - I had issues with my cruise control and this forum helped me out as it was definitely the brake switch.

 

[gooffeyguy]

On my 2003 Avalanche, the brake controller plugs into the relay panel under the dash. According to everything I have read, this is not an option for the 2007 Yukon. I have read that you have to find a bundle of wires under the dash and hard-wire it. I cannot locate this bundle of wires. Any help is appreciated.

BTW - I had issues with my cruise control and this forum helped me out as it was definitely the brake switch.

I had trouble finding mine, they were up there pretty high

Sent from my SM-G930V using Tapatalk

 

[smokymtn65]

My cruise works fine, the controller will light up at any given time with or without a trailer. The trigger wire for controller must come from a different source than cruise kill and Brake lights..