All the interior lights on my '94 Bronco turn on when parked for awhile. Only way to turn them off is by starting up the Bronco and then shutting it down. Disconnected the battery, allowing for things to reset. I have been driving it for a month and all seemed well, however the same problem started again tonight. Drove in the rain today. Suspect there is a relationship. Any ideas where I should begin in finding the problem Need it for work tomorrow, so the battery is disconnected again.Could not risk the lights turning back on over night and having a dead battery.

 

I would start looking at both of the switches that turn the dome light when you open the door. It could be that water has just gotten to one of them and fuc^ed it all up.

 

Streetgang:

You were right on with water getting to one of the switches. Took a couple of days to dry out in the garage and interior lights are back to normal. Now I have got to figure out which switch and where the water is entering. Appreciate the post.

 

Your welcome......to find the bad switch, just remove both of them and look each over very closely....you should be able to see some evidence of contamination on the bad one.
As for finding where the water is getting in......well I would start with the rubber molding/gasket that goes around the door....but even more likely.... take a look at the rain gutter that is above the window at the edge of the roof on each side. See if you have a small stress crack at the rear most of the rain gutter, between where the cap and where the gutter starts. What you can do is search for cures here....or what I did a while ago was to use just a bit of clear silicone and seal it up.....worked perfect.
These are stress cracks and 90% of all the later models (80's-96 dont know about the older ones with the drastically different body style)will have them....some have it on one side and other have the problem on both sides.....some have it real bad and others not so bad.....you need to take a look at yours. Ford used to sell a "repair kit" to remedy the problem.....looked more like a temporary band-aid fix to me though....and Ford dont make them any more so it dont matter. The real fix is to weld in some sort of brace....or like add a roll cage or something?????