I changed out my heater core on my 98 friday and saturday. It wasnt hard at all just time consuming. Everything went smooth (thanks to the guy for sending me the directions). When I got everything back together I noticed my interior light, door lights and cargo lights(all the lights that come on when the door is open) stay on all the time now. I had to pull the fuse to get them off. Does anyone have any ideas why the lights would stay on? Where are the connecters for the lights?

 

The switch inside the door is bad!
It wasn't the dash work. It has happened to me before.
Try some WD-40 on the door latch.

 

I just soaked both latches down and it didnt help. I pulled the fuse but it kills my power windows also. Is it hard to replace or check them?

 

Also wouldnt to door ajar light be on too?

 

door panels come off easy enough. Unplug one at a time and try.

 

I had to take my truck to the dealer because the interior light would not shut off and he sparyed WD40 and it works fine now. He also told me the light turns off after 5 minutes anyways.

 

Mine Did Same Thing And Wd-40 Worked......