The interior lights on my 2001 Chrysler Concorde flash on and off by themselves. It happens day or night, rain or shine, car running or parked. I pulled the fuse to keep it from draining the battery.
The interior lights are controlled by a module that gets its information from the sensors in the car door and the switch on the dash that is associated with the dash lights. There is an intermittent short in one of the doors or the module.
Sorry it has to be so vague, but there is not way to know where with out taking some things apart. An intermittent electrical short that can not be duplicated on demand is the hardest thing to diagnose. This is one that needs to go to someone who specializes in electrical diagnosis.
Hope this helps
Had the same problem with our 2001 Concorde. Our mechanic could not find any shorts or determine the cause. However, after pulling the fuse and replacing the battery on which the terminals were badly corroded and not holding a charge after 10 years, he put everything back together and reinserted the fuse. Problem fixed!?! Apparently the battery was not holding enough of a charge to properly maintain current for the computer module that runs the sensors and interior lights. Once "rebooted" and properly charged, the lights are working properly again and the battery is no longer being drained. I would try this first before spending a lot of money ... a special thanks to Ed & Jerry's garage in New Wilmington, PA for a job well done!
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Pull one door sensor at a time and test. They get compressed too far and eventually no longer open the circuit. If you find a switch compressed too far, just replace it...
Door switches are self adjusting, to allow for differences in jamb tolerance... Start with driver's door.
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