I have a 1998 Jeep Grand Cherokee Larado and the break lights are not working at all, although the back lights aluminate. I tried replacing the switch under the pedal, but that didnt work, and I checked the fuses and that wasnt the problem either. I have concluded myself that it has to be some kind of electrical issue, but I'm not sure. Has anyone else had this issue or know what could be wrong?

Oh yeah! its not the bulbs eithier.

 

There is a BRAKE light module in a ZJ. Located behind the drivers rear light, in the panel behind the spare(I think)

 

I found a few threads on LAMP OUTAGE MODULE.

Search the popular Jeep forums for that info. HTH

 

My 98 does not have a module behind the spare except for the one I put back there for towing. All I found back there was connectors that I had to hook into my wiring kit.
http://hitches4less.com/1995-grand-c...er-wiring.html