I have a 1993 jeep cherokee and the brake lights stopped working on me when I was on a trip from CA to AZ. The running lights still work, just not the brake lights. I have checked fuses, light bulbs and even hooked up my uncles circuit tester to see what was going on and we were getting no signal on brake lights but getting a positive on the running. I have no idea what the issue is and co-worker recommended I check here before I take it into a shop. Nothing worse then paying $200 for something could have cost $20.
Still trying to figure this out. Brake light switch has no power. No power at rear lights as well. I have power at the fuses. The hazards also don't work and the turns stoped working. I wonder if my problem lies in the turn signal switch
Well on a Cherokee the brake lights don't go through the turn switch. I'm thinking the bulkhead connector/fuse box as suggested by mj40 above is most likely where your problem is. I've seen water get in it and corrode away the terminals.