Hello guys I need help i have a 88 S1I blazer 4.3, the problem is my brake lights aren't working i've checked fuses and my bulbs. iv'e changed the multi-function switch and bulbs and i'm stumped any help would be great.

 

Do the parking lights work? I would start checking the brake light switch under the dash

 

Yes the parking lights work. where is the brake light switch located?

 

It is usually located at the end of the brake pedal. Basically it is a little sensor the tells your lights that your brake pedal has moved. sometimes they need to be re-adjusted. My brother had the same problem on his car. Just make sure to not over correct it because your lights will stay on non stop even with the key out.

 

its located under the dash behind the brake pedal. if you are looking up under the dash, at the brake pedal/arm. The switch should be gray or white