Hey , I finally got this problem solved. I had to go through every componet from the battery to the switch. I found that the fuse block (Behind the glove box) did not have battery power supply to three fuses. While checking every inch of the Red wire / black tracer I found it had power leaving the power distribution box ( under the hood ) but not at the first harness connector under the dash. The wire was burnt in-two about a foot from the power distribution box hidden within the protective loom. The wire insulation had been damaged during factory installation and salt water or soapy car wash water ran down the harness causing the wire to corrode without blowing a fuse. Jeep wiring diagrams (Cartoons) made this a more difficult to diagnose and find. I am a happy man now! Thanks, Hunter.
Check fuses or headlight switch
brakes and running lights have separate fuses. check the fuse then check the brake light switch under the dash
Fuse number 4 disconnects the doors switch from turning on the interior lights
I have the same problem with my 1998 wrangler, I have been told it is the Multi-function switch in the steering column, but I have not changed it yet, can't seem to find it at local auto parts store!
If all the running lights (front & back) are not working I'd start by checking the fuses then onto the headlight switch
Check for bad ground
If the fuses are good, then check the light switch itself. It could be that over time the current draw on the light circuit has damaged the plug-in connection at the switch. check the fuses
Check the fuses.
Check your fuses. See owner's manual fo rlocation and identification of fuses.
If you've already checked all of the bulbs and the fuses (to include the maxi-fuses under the hood), it might be your multifunction switch. I had the same problem, and had to take my Jeep to a pro to diagnose it.
If the dash lights in a 2003 Jeep Wrangler are not working, it could be due to a blown fuse, a faulty dimmer switch, or a burned-out bulb. Check the fuse box for any blown fuses related to the instrument panel lights. Additionally, inspect the dimmer switch to ensure it is functioning properly and adjust it to see if the lights respond. If these components are fine, the problem may lie in the wiring or the instrument cluster itself.
change the headlight switch it controls the running lights....$15 at autozone