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Yukon brake light

2005 Yukon brake lights don't work, including third light, replaced brake light switch without resolution, checked fuses which are fine. has 14 volts across brake light fuse whether brake pedal is pressed or not.

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You have power at the fuse. The brake light switch has two wires on it, one is the supply from the fuse the other is to the lights, Check for volts at the switch (yes), bridge the two wires then follow the wiring checking for a live. Start at a light and work your way back up the loom checking all connecting sockets, has the vehicle a trailer socket, check the multi-plug where it picks up the wiring.

Posted on Jan 03, 2014

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Posted on Jan 02, 2017

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  • 1 Answer

SOURCE: brake lights/rear turn signals

I had the same problem with my 1999 Yukon. The electric board needed to be replaced. Rust starts to build up and shorts out or blows the bulb. The dealership charged $73.60 for the part and I installed it myself (Saved $30).

Posted on Jan 05, 2009

  • 9 Answers

SOURCE: No brake lights on 96 yukon

The brake fuse #1 is located inside the truck below the steering column. I am assuming you have verified there is 12v power at the fuse & thru the brake lamp switch (orange wire power in & white wire power out, when pedal depressed) at all times. After the brake lamp switch , power goes (white wire) to the Turn signal/hazard lamp switch & out (dark green wire-rt brake lamp & yellow left brake lamp)

Posted on Feb 16, 2009

  • 1 Answer

SOURCE: 2002 yukon no brake lights but third brake light works

ed7882 I had the same exact problem and thought it was a fuse or the wiring. Come to find out it was just a blown bulb. They are inline together with the cruise so if one blows it all goes. So change out the lights and that should fix it for you.

Posted on May 26, 2009

  • 83 Answers

SOURCE: 2005 Yukon XL, third brake light intermittent

Remove bulb, make sure it sits tight in the socket. make sure socket is not burnt up (brown or black in color) Check bulb, if the filament inside is loose or discolored, replace as nesessary. Check brake light switch under driver side dash above brake pedal. make sure it is adjusted correctly.

Posted on Jul 23, 2009

  • 2 Answers

SOURCE: 2007 Yukon tail stop lights wont light up

It sounds like the brake switch, that is usually located along the shaft of the brake peddle under the dash, these sometimes are in a bracket for ajustment may not be able to depress switch. Falow starting at peddle go up to dash, you should be able to see it. Hope this helps.

Posted on Sep 08, 2009

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1 Answer

My brake lights are not working on a 1999 gmc Yukon I have replaced the brake light switch, bulbs, and fuse what else could keep my brake lights from not working


check your Head Light Fuses I know for some reason that Happen to me and I had to replace my head light fuses. I would also check the circurt line out and make sure its getting power to it.

Sep 28, 2014 | 1999 GMC Yukon

1 Answer

My brake lights on my 2003 Yukon do not work....the 3rd light works, i replaced the Brakelight switch and checked fuses. Do anyone know what may be the issue?


Chances are the problem is the turn signal switch.
Someone would need to check the circuits going in and out.
The third brake light passes by the switch, the rest go thru it.

Jan 17, 2013 | 2003 GMC Yukon

1 Answer

Is there an adjustment for the stop light switch on a 99 GMC Yukon. I have replace it and my brake lights still do not work. Park lights work fine.


There is no adjustment. The park lights are on a different circuit than the brake lights.
Do you have a third brake light that works. Its also on a different circuit but works from the same switch. Do your turn signals work. They use the same filament as the brake lights.
Also, the brake light circuit goes through the multi function (turn signal) switch.

Since the brake lights and turn signal lights use the same filament in the bulbs, the brake light circuit will pass through the turn signal switch. When a turn signal is used it cancels out the brake light for that side.

Let me know if your third brake light and turn signals work in the rear.
Also, if youy have not already, check/change the bulbs. The type of sockets those lights are in also get burned so look at them well.

Oct 18, 2011 | 1999 GMC Yukon

1 Answer

2005 Yukon breaklights and cruise control don't work. The breaklights bulbs are good, already checked them.


Brake light switch has failed replace it and the lights and cruise should work. When the switch fails it comes apart and the computer thinks the brak is on and the lights won't come on.Costa $20.00 and has a three wire plug on it and is simple to change.

Nov 02, 2009 | 2005 GMC Yukon

1 Answer

Brake lights for 2005 gmc yukon does not work.


If your fuses and bulbs are all good, then look above your brake pedal and you will see your brake switch up along your brake pedal arm. It will either be between the brake arm and the firewall so when you brake it pushes the switch in. Or it will be between the dash and the brake arm so when you brake it pulls the switch out. Most likely this switch needs to be replaced

Nov 02, 2009 | 2005 GMC Yukon

3 Answers

2005 Yukon XL, third brake light intermittent


Remove bulb, make sure it sits tight in the socket. make sure socket is not burnt up (brown or black in color) Check bulb, if the filament inside is loose or discolored, replace as nesessary. Check brake light switch under driver side dash above brake pedal. make sure it is adjusted correctly.

Jul 23, 2009 | 2005 GMC Yukon Xl Denali

2 Answers

Rear led brake light broke, replaced but new not working


YOU MIGHT WANT TO TRY TESTING THE TRAILER PLUG FUSE SOME OF THE THIRD BRAKE LIGHTS WORK OFF THAT FUNCTION. IF THAT DOES WORK TEST THE PLUG FOR POWER BEFORE THE PLUG, IF YOU HAVE POWER THAN IT IS IN THE PLUG, IF YOU DONT THAN CHANCES ARE IT IS IN THE FUSE BOX TEST ALL FUSES UNDER DASH AND UNDER THE HOOD.

May 20, 2009 | 2005 GMC Yukon Xl Denali

1 Answer

2002 yukon no brake lights but third brake light works


ed7882 I had the same exact problem and thought it was a fuse or the wiring. Come to find out it was just a blown bulb. They are inline together with the cruise so if one blows it all goes. So change out the lights and that should fix it for you.

Apr 02, 2009 | 2002 GMC Yukon XL

3 Answers

Brake lights/rear turn signals


I had the same problem with my 1999 Yukon. The electric board needed to be replaced. Rust starts to build up and shorts out or blows the bulb. The dealership charged $73.60 for the part and I installed it myself (Saved $30).

Dec 14, 2008 | 1999 GMC Yukon

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