Chrysler Repair: interior lamps wont shut off in 95 Chrysler LHS, 1995 chrysler lhs, light fuse

Question
Hi Roland I have a 1995 Chrysler LHS with 79,000 miles -All of a sudden it happened- I shut my car off and came out to a dead battery the next morning. So we charged the battery and it turns out my interior lights are not dimming and turning off like they normally do. We pulled the fuses out under the hood and made sure they were OK and also the interior fuses. I found the fuse for my interior lights but when I pulled it out of course my remote doesn't work and I have to unlock the doors by hand and I have no alarm system. So next we tried checking the door switches-one by one we took them off and still the lights stayed on. We went back under the hood and pulled the one fuse for the lights out and put it back in and everything started working properly again. My interior lights dimmed like they are supposed to and my alarm and remote worked fine for about an hour till I shut the car off again and the lights stayed on. Out of frustration we pulled the interior light fuse. Also my message center is showing an open door but there are no open doors-I realize the open door would make the lights stay on. My boyfriend thinks that the door switch is bad on one of the doors or the battery is low. It seems to me that if a door switch was bad when you pulled each one of them off the lights would go out? Or maybe the switch is not making connection or something.I would really like to try and figure this out-I really still love this car even though it is old- it is mint. I have never had any kind of problem like this with the car before. Believe it or not the batteries in the remote are still the originals. I would appreciate any help or ideas you may be able to give me.Thanks much for yout time. Maria

Answer
Hi Maria,
Thanks for the detailed explanation. I suspect that one of the door switch wires has a bit of insulation worn away and it is touching a metal surface which is thus causing a false door open condition to be detected and thus turning on your interior lights. First you need to find out which wire is grounded. If you have a digital voltmeter you could retest the wire at each of the door switches to see which one of them is reading 0 volts with the other lead of the voltmeter attached to a shiney metal screw nearby which would serve as a body ground measuring point. I believe that you will find one of those four wires reads 0 volts while the rest read a voltage of a few volts.
If that is the case, then you will need to try to find out where the wire insulation has been damaged by moving the wire to see whether you can get that wire to behave like the other 3 door wires as to the voltmeter reading. Try wiggling the wire that is reading 0 volts to see if you can get its reading to be similar to the other three.
The wires are wrapped together with other wires in "harnesses" and to the extent that you can wiggle the harness of the effected wire you might find out where it is grounded. The four separate wires ultimately end at the body computer which is either found on the passenger side kick panel (just to the right of the passenger's right shin, up under the dash on the cowl) or it may be next to the fuse box under the dash (I am not in possession of the shop manual as to exactly where this module is located, look at both locations). It has a plug(s) with many wires coming in on it (them). Four of those wires will be identical in coloring to the wire colors that you find at the door switches. So look there to see if there might be some insulation broken on one of them of if the socket at the plug might have some dirt/water that is grounding the wire at that point where it enters the body computer.
So you basically need to find which door switch wire is falsely grounded and where. As a last resort, if you find which wire is grounded but you can't find out where, you could simply cut that wire at the plug for the body computer but then that door will no longer operate the interior lights when you open it.
So do the test with the voltmeter and let me know what you find out.
Roland