If you've already checked all of the bulbs and the fuses (to include the maxi-fuses under the hood), it might be your multifunction switch. I had the same problem, and had to take my Jeep to a pro to diagnose it.
My rear window brake light works, but not my tail light brakes on my 1997 Monte Carlo. What is the problem?
Bulbs? Sockets? Steering column switch?
Change out the switch. Bad switch!!
whats the color circuit for the blinkers an break lights?
I am currently having the same problem you are having check the fuse to see if it is blown the blinkers and brake lights are on the same fuse my system has a short in it somewhere and is popping the fuses I am in the process of running new wires since the wonderful people at Chevy ran all the wires thru the frame and you can't access them
Check the 30 amp brake fuse (green) in the engine compartment fuse block.
I have a 1983 GMC Sierra it has no dash,tail lights an brake lights are very dim
brake light switch is above the brake pedal under the dash
Check the fuse
Well, that depends on whether you still have the lights and blinkers, ect. If there are not lights, blinkers, brake lights, or horn, then you do not need a battery to run this bike. If you do have these items, then you would need a battery
The problem might not be a fuse. There is a switch which activates the brake lights when the brake pedal is depressed. This switch is usually mounted under the dash, near the top of the brake pedal lever. Insure that this switch is free to move physically, and test it to see if it is switching electrically.
I have the same problem with my 1998 wrangler, I have been told it is the Multi-function switch in the steering column, but I have not changed it yet, can't seem to find it at local auto parts store!