Brake lights not working

Asked by vXv_Cobra_vXv Feb 13, 2022 at 07:12 PM about the 1994 GMC Sierra 1500 C1500 Special Standard Cab LB

Question type: Maintenance & Repair

Ok I have replaced the brake switch (on the pedal) as well as the relay (drivers side firewall under the hood) and I still end up with one hot wire at the switch and no power to the fuse (dash panel at drivers left knee). If I put power via a jumper wire to the one side of the fuse, I can hear a relay or something clicking under the dash on the passenger side of the cab but still no brake lights... help please!!!

3 Answers
307,225

Gene answered 2 years ago

Sounds like a broken wire. Check the connector’s wires, it could be broken internally.

Mark helpful
38,915

beatupchevy answered 2 years ago

You need a multi tester and electrical knowledge to see what has power ground and what don't . I think the brake light runs through the directional switch , if they share a bulb in the back .

Mark helpful

vXv_Cobra_vXv answered 2 years ago

I feel stupid after figuring out what the problem was: All of my troubleshooting was done with the ignition off (since brake lights don't need the key on to work) and working by myself I checked functionality by looking for the light to reflect off of the wall i was backed up to (I could see the light reflect when I turned on the Hazard lights so knew the bulbs/bed wiring was good). Long story short, I had accidentally set the left turn signal on... which with the hazard lights on changes nothing (but with the key off it prevents the left brake light from working...) Once I started the truck and everything worked properly.

Mark helpful

Your Answer:

Related Questions

  • Brake lights not working 3 Answers

    Ok I have replaced the brake switch (on the pedal) as well as the relay (drivers side firewall under the hood) and I still end up with one hot wire at the switch and no power to the fuse (dash panel a...

    1994 GMC Sierra 1500 C1500 Special Standard Cab LB

    -

    Maintenance & Repair

  • 2000 GMC sierra panel lights, turn signal and brake lights not working 1 Answer

    changed turn signal fuse, left worked twice, right has a humming sound then fuse blew again. No panel lights, cargo lamp or brake lights. check engine light illuminated constantly.

    2000 GMC Sierra 1500 SL Standard Cab SB

    -

    Maintenance & Repair

  • Right brake light not working 5 Answers

    My 80 GMC right tail not working I've replaced the bulb and replaced the bulb connector also cleaned the ground wire replaced fuse and still nothing. Any helpful suggestion could anyone think abo...

    GMC Sierra 1500

    -

    Maintenance & Repair

  • I have a 2004 GMC Sierra that the brake lights r not working. Any ideas? 1 Answer

    I have a GMC 2004 Sierra that the brake lights are not working?

    2004 GMC Sierra 1500

    -

    Maintenance & Repair

  • Right Rear Brake not working 1 Answer

    Problem description: Right rear brake not working. I can push the pedal as hard as i can and when in dirt the tire still spins. When jacked up I and push pedal as hard as I can the right tire still ...

    1999 GMC Sierra 1500 SL Standard Cab SB

    -

    Maintenance & Repair

Sierra 1500

Looking for a Used Sierra 1500 in your area?

CarGurus has 8,182 nationwide Sierra 1500 listings starting at $3,000.

Postal Code:

Shortcuts

Search GMC Sierra 1500 Questions

CarGurus Experts

  • #1
    yetilikesbeer
    Reputation
    12,350
  • #2
    dragonflyoffshore
    Reputation
    11,500
  • #3
    John Saffrahn
    Reputation
    11,440
View All

Find great deals from top-rated dealers

Search

Related Models For Sale

Used Ford F-150
315 Great Deals out of 13,805 listings starting at $4,500
Used Toyota Tacoma
44 Great Deals out of 740 listings starting at $9,975
Used GMC Yukon
17 Great Deals out of 970 listings starting at $3,000
Used Dodge RAM 1500
89 listings starting at $2,500
Used Chevrolet Tahoe
12 Great Deals out of 807 listings starting at $9,980
Used Chevrolet Camaro
16 Great Deals out of 467 listings starting at $10,995

Content submitted by Users is not endorsed by CarGurus, does not express the opinions of CarGurus, and should not be considered reviewed, screened, or approved by CarGurus. Please refer to CarGurus Terms of Use. Content will be removed if CarGurus becomes aware that it violates our policies.