left side running lights

Ok this is weird to me.
I have no running lights on the left side of my truck (front and rear).
Fuse is ok and all bulbs are ok. All other lights work fine (including the brake light which uses the same bulb)
I checked the connections in the back behidn the kick-panel where the spare tire is located. The tail light singal isn't making it back there at all.
Any idea's?
Where and how do these wires run exactly anyone know?

oh sorr - this is a 2000 Jeep Cherokee Sport inline 6 4 liter.

I came to this post looking for the solution to this same problem. I just started having the same problem on my 1999 Cheroke Sport. I don't know if it is related or not, but I just resolved a problem with the engine not shutting off when the key was switched off. It would keep running for 10 to 20 seconds after switching off the key. Found it to be the starter relay in the fuse/relay box near the battery.

Did you check your ground connections? I know of two locations. 1 is behind the side panel where the spare tire is. The other one is on the left front fender side (splash) shield near the power train control module. It was hidden behind the wiring on mine and it took some searching to find.

Are you sure you checked the correct fuse? There is a seperate fuse for almost everything (left running lights, right running lights, left brake lights etc.). I had the same problem and spent an hour in a parking lot trying to find the problem. I was ABSOLUTELY CERTAIN I had checked all the fuses. When I got home, I checked the fuses again and found the fuse for the left running lights was blown.