Question about Cars & Trucks
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.
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
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
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
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
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
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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