My Jeep has 170K. Driving yesterday, it started to rain. Put on the wipers and headlights with no problems. Rain stopped, shut off the headlights and wipers. 10 mins. later started really pouring, and headlights (including dash illumination) and wipers would not come on. Had to drive real slow to get home. When I got home, I swapped the wiper relay with the horn relay (the horn was working I checked it during the wiperless lightless drive home) still nothing.

When I got home, I checked the connectors under and around the steering column (I did the big heater core replacement job last Thanksgiving) in case some connector popped out, but everything was good. As a last resort I started checking fuses. Pulled a bunch of them out, none were blown. As it was getting dark, I went to move the car into the garage and the lights and wipers were now working, despite me not really doing anything. I dont' think it's the stalk as the rear wipers were working during the headlight/wipers not working time, and the horn worked too. Any ideas? Thanks!

 

I've got to think about this awhile. I've got a 2000 WJ as well!

 

Yeah, luckily it was still light out. At night this would have been really dangerous.