All brake lights not working

1998 CHEVROLET LUMINA

150,000 MILES • 3.1L • V6 • 2WD • AUTOMATIC

NFELTCH23@GMAIL.COM

MEMBER
2 POSTS
FOLLOW

Found out brake lights aren't working yesterday. Replaced the brake light switch, checked all the fuses with tester and they work, changed bulbs, and still not working. The back right light casing was holding condensation. Every other lights is working properly, but the 3 brake lights. Not familiar with anything else to diagnose the issue. Any suggestions would be appreciated.

Mar 24, 2021 at 12:54 PM

ASEMASTER6371

CERTIFIED EXPERT
52,796 POSTS

Good afternoon,

I attached the wiring diagram of the brake light circuit for you. You need to test for voltage to the stop light switch to be power is there.

https://www.2carpros.com/articles/how-to-check-wiring

https://www.2carpros.com/articles/how-to-use-a-voltmeter

https://www.2carpros.com/articles/how-to-check-a-car-fuse

Check the fuse for power on both sides.

Roy

REMOVAL PROCEDURE
1. Remove the driver's side instrument panel insulator.
2. Disconnect the electrical connectors.
3. Remove the stop lamp switch from the brake pedal bracket.

INSTALLATION PROCEDURE
1. Install the stop lamp switch to the brake pedal bracket.
2. Connect the electrical connectors.
3. Install the driver's side instrument panel insulator.
4. Adjust the stop lamp switch.

Images (Click to enlarge)

Mar 24, 2021 at 1:37 PM

NFELTCH23@GMAIL.COM

MEMBER
2 POSTS

Thanks. Seems to be the multifunction arm switch (turn signal switch.) Lights work while slightly pulling the arm to me.

Mar 25, 2021 at 2:51 PM

ASEMASTER6371

CERTIFIED EXPERT
52,796 POSTS

Okay, I would replace the turn signal switch as that sounds like the issue.

https://www.2carpros.com/articles/turn-signal-switch-replacement

I posted a YouTube video below for the replacement.

https://www.youtube.com/watch?v=TzzcVeLOp_c

Roy

Image (Click to enlarge)

Mar 25, 2021 at 3:00 PM