Brake Lights

MATEO3527

MEMBER
1988 MERCEDES BENZ 300SE
6 CYL
2WD
AUTOMATIC
140,400 MILES

I have a 1988 Mercedes SE. Last week, my left brake light was out. I took out the bulb and it was bad. I had to go buy one so I put the tail light assembly back on. Then both brake lights and the rear window brake light wouldn't work. I replaced the bulb and the fuse but all brake lights still don't work. Any ideas? Maybe the brake pedal switch? How do you check/replace it? Thanks for any help.

1 Reply

KEN L

MASTER CERTIFIED MECHANIC
42,822 POSTS

Hello,

You have a light out warning module that I think is going out here is a guide to help you test to find where you are losing power along with the brake wiring diagrams. (Below)

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

Check out the diagrams (Below)

Please let us know what happens.

Cheers, Ken

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