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.
01-06-2012 03:25 PM
check the firewall block to the fuse box..green death got to this 92....your signals and brakes are supplied by one wire as well the 4way/hazards...park is fed from another supply..
i am having the same issue and will check this out.
thanks man ill post my findings
02-12-2013 04:25 PM
If your turn signals and brake lights are the same bulb (American Style), the brake lights go through the hazard switch. Try activating it a couple of times, that usually solves the issue.
02-12-2013 04:59 PM
Ah brake switch above your feet maybe? Jumper power from the 16PK/BK (fused +12V) to the 18WT/TN (brake light bulbs) and see if they work.
02-15-2013 10:37 AM
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
02-15-2013 10:38 AM
Also noticed that the powers seats don't work and neither does the horn.
02-15-2013 11:23 AM
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.
02-15-2013 02:35 PM
I removed the power relay centre and everything looked good and had power. I'm trying to trace wires from the in car fuse panel. The brake light fuse has no power.
02-15-2013 03:18 PM
fuses # 1,2,3,4,5,6,7,14,23,24 and 28 dont have power. This is really staring to stump me.
02-15-2013 03:18 PM
sorry 5 has power
02-15-2013 04:16 PM
The bulkhead connector is right behind the under dash fuse box. Two screws hold it to the firewall and one bolt holds the underhood part to the under dash part.