no tractor brake lights

Do the 4 way flashers work? If so then the brake lights have power and I would check the switch on the brake pedal. Try your trolley brake. That makes the brake lights come on also. If that works then same thing. Check the switch on the brake pedal

 

One switch for the tractor and one switch for the trailer?

 

Trolley brake won't turn on tractor brakes, just trailer, but the wires for the turn signal and brakes are not the same wire

 

I just tried it. My tractor brake lights go on.

 

if your 4 ways work..sounds like brake switch on top or back of your brake pedal.. useually there is a power lead in to the switch and another going out to brake lights..pretty easy fix..

 

I have three trucks, 93 and a 97 KW, the other is a 06 Pete. When you pull the trolley hand on the two KW's they light up the tractor brakes. The Pete will not light up. I'm not sure If it is a truck manufacturering thing or something else.

 

I second the brake switch as your culprit too.

 

Wouldn't the brake light switch be the only thing that activates the trailer lights also?

So if the switch is bad why are the trailer brake lights still coming on?