Jamessell

Just bought a 1999 Grand Cherokee Larado. Brake lights did not work. Found a fuse missing from fuse panel and put one in (20 amp) and brake lights worked! Only problem is that they stay on all the time, even with the ignition switch turned off. I checked the brake pedal switch and it seems to function correctly both mechanically and electrically. Any ideas?

CrawlerXJ

Doubtful, but try the brake fluid.

My guess, previous owner pulled it as he was tired of it too. Probably brake pedal switch.

Jamessell

Checked brake pedal switch. Works as per Haynes Repair Manual, no continuity when it is supposed to have none, has it when it is supposed to?

Bustedback

Just replace the switch. My 95 had the same issue once, the switch was the problem.

ZJFreak

I cant find what its called on autozone for the switch mine is sticking also.

Bustedback

Stop light switch.

Jamessell

It was the stop light switch. I had previously pulled the switch and checked it electrically but it was a mechanical failure that cause it to fail when in position. New switch fixed. Thanks all.

basegrinder

Not that uncommon. heck I should pull one next time I'm at the junk yard. My was "stuck" off until a quick cleaning.

dave1123

Big feet with mud covered boots?

danWI

I currently have a sticking brake light ON situation that seems to occur on days the temp drops below freezing. I pull the fuse, wait 60 seconds, and replace the fuse. Lights are reset. Weird, yea? So can the Brake Switch be cleaned or must be replaced?

dave1123

The plastic is probably shrinking in the cold and making contact inside. Replace it.