Have you checked to see if your back lights are not burned out? That could be the problem.
If your bulbs are good then you have a broken set of wires going to the rear lights, (look by where the trailer wiring was installed if so equipped as that's a common area of problem for broken wires. Hope that helps. i had the same problem with my 1985 south wind it had a exposed wire that ran right behind the brake peddle throw the floor Bord they did make the hole big enough so when the pushed the wire throw it striped it so every time i hit the brakes the fuse would blow. and i would have no lights. don't know if this helps you, good luck .
Could be the brake light switch or fuse.
It is not necessarily the fuse. It could be the switch on the brake that is not closing the circuit.
if the tail lights work but not brake lights then its most likely just a blown fuse or it could be the switch at the top of your brake pedal arm.
Could be a bad wiring harness, disruption of the circuit somewhere between the brake pedal and the brake lights, a bad switch which fails to actuate the brake lights. See sources and related links below for bulb information.
I found this on my 1997 Silverado and found the connection from the wiring harness to the back OS the switch itself was loose, I could wigle it arouns and make the lights come back on.
Check the fuses first then check the bulbs.
it could be that your brake light switch under your dash that sits right on top of your brake pedal has gone out
You may have blown a fuse. You may have to replace your brake light switch which is located above the brake pedal under the dash. Also it could be your emergency flasher knob if its broken. All of your turn signals and break lights run through it and if the connections on it are off none of the brake lights and turn signals will work.
It could be the brake light switch (the switch that activates the brake lights when you step on the brake pedal) has gone bad
possibly the fuse for brake lights......also could be brake light switch----turn signal switch----broken wiring anywhere in the vehicle---relay not working ---any other item specific to your venicle.
A defective brake light switch could cause the problem. Also a defective turn signal switch could also. The brake lights work through the turn signals. It cancels the brake light so that the turn signal can work.
check your ground wire in the back