I do not have brake lights.
The brake light over the cab is working but the tail lights (brake lights) are not working.

Where do I start looking for the problem?
Tail lights work and so do turn signals.

Thanks,

 

MFS or one of its connectors, usually.

 

Hey from southwest okc. Have you checked all the fuses under the hood?? Might also look at the connectors under the bed and also make sure your trailer harness isn't shorting out somehow. Have you looked at the bulbs??

 

im guessing the brake light and turn signals use the same filament in the bulb.. THe main switch (turn signal) on the steering column selects which function goes to the bulb.. projectSHO99 said MFS = multi function switch..

 

Even the brake lights?

 

Yes, the stop lamps go through the MFS. The HMSL does not.