I had issues with the driverís side trail light since I purchased my jeep. If the jeep sits for a day or more, the passenger stop/taillight works fine. Some times when I turn on the light the brake will magically begin to work. The blinker and the running bulbs have always worked fine on the driverís side. It is just the brake light that is a mystery.
I completely rewired the taillight wiring harness from the fuse box back to the taillights. I have even grounded the housing to the rear cross member. Last night I even ran a wire straight from the ground point to the negative post on the battery and it was still hit or miss.
I checked for current at the taillight harness when the light was not working and there was none. Could it be the brake switch? Or does the brake switch only send out one signal?
Not sure about the CJ5 but I suspect it is the same as a cj7. I had a similar problem and it turned out my turn signal switch wasn't centering well. Both the turn signal and brake light are the same element in the bulb and run through that switch. Try working the turn signal switch back and forth while pressing the brake pedal. With mine there is a sweet-spot that it seems to work in. I haven't gotten around to replacing my turn signal switch.
My turn signal does not reset after i turn. It is worth a shot. last night i walked into the garage and stepped on the brake, passenger works but not driver's side. I tired turning the lights on and off and still no light when i step on the brake pedal.
Thats great! It sounded exactly like what I had seen on mine. When you fix yours let me know how it goes. I dont know when ill get the chance to fix mine. I'm not sure, but I suspect you might be able to just clean the contacts rather than replacing the switch. It depends on whether the switch is sealed or not.