Brake switch No problem with other lights, just brake pedal lights wont work. How do you replace a brake switch for 99 yukon?

Check brake switch above brake pedal

brake switch needs adjustment if it works with slight pressure on the pedal readjust it where it needs to be..

My first check would be the brake light switch located on the upper section of the brake pedal...

I had a similar problem when I owned a 1997 Expedition. In my case, the brake light switch, mounted to the brake pedal arm, was faulty. My guess is that you have a similar problem. Pretty easy to replace... couple of wires and a clip as I recall.

Good luck.

Sounds like you are on the right road with the switch. Before I bought a new switch I would locate the switch, it will come in direct contact with the brake pedal arm, and see if there is an adjustment or if it has moved for some odd reason. Sometimes things just happen.

Had the same problem on my Yukon, I had to get the winshield wiper switch (controls cruise control, turn signal, and winshield wipers) replaced. This switch controls the hazards as well.

Hi to locate the brake light switch you need to have a very close look at the brake pedal (now this is where you need to be a contortionist) if you follow the brake pedal right to the top just before it goes through the bulk head, now at the very top of the pedal if you have a close look you will see the brake light switch its actually located at the very back and very top of the brake pedal.

its a bit hard to get to but if you slide the drivers seat right back and you sort of break your neck twisting round to have a close look at the brake pedal you should just about see the brake light switch its at the very back of the pedal and will have a couple of wires going to it.

now if you have got big hands your in trouble as its very hard to get to so you may struggle.

let me know if you have any problems ok

plz rate this solution as i have a whole page of unrated posts, thanks

Change the break light switch under the brake pedal. I have a 97 yukon and it's probably the same, it is really hard to get to. You have to take off the panel under the stirring wheel then look directly behind the brake pedal, it's a big white plastic piece you have to to unplug it. It took us an hour to get it off

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

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.