# Interior lights **URL:** \ **Category:** Maintenance/Repairs\ **Tags:** mercury, lights\ **Created:** [April 20, 2010, 1:51pm UTC](https://community.cartalk.com/t/interior-lights/47734 "2010-04-20T13:51:33Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![elke421](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/elke421/32/1807_2.png) [@elke421](https://community.cartalk.com/u/elke421)\ **Post date:** [April 20, 2010, 1:51pm UTC](https://community.cartalk.com/t/interior-lights/47734/1 "2010-04-20T13:51:33Z")
Our cars interior lights go on by themselves and go off. This is a problem as it has drained the battery. It seems to be vibation like motorcycles loud cars(muffler) etc. Have you clues? There is a security system but the alarm does not go off but the same lights go on/ ---
**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\ **Post date:** [April 20, 2010, 1:54pm UTC](https://community.cartalk.com/t/interior-lights/47734/2 "2010-04-20T13:54:19Z")
The Grand Marquis has changed a lot through the years. What year is yours? ---
**Author:** ![elke421](https://sea1.discourse-cdn.com/cartalk/user_avatar/community.cartalk.com/elke421/32/1807_2.png) [@elke421](https://community.cartalk.com/u/elke421)\ **Post date:** [April 20, 2010, 1:55pm UTC](https://community.cartalk.com/t/interior-lights/47734/3 "2010-04-20T13:55:41Z")
It is a 2000. ---
**Author:** ![tardis](https://avatars.discourse-cdn.com/v4/letter/t/f0a364/32.png) [@tardis](https://community.cartalk.com/u/tardis)\ **Post date:** [April 20, 2010, 2:26pm UTC](https://community.cartalk.com/t/interior-lights/47734/4 "2010-04-20T14:26:56Z")
It’s probably the LCM (Lighting Control Module). It could be one of the door latch switches, but if that were the case you would probably be also complaining that you get a lot of door ajar indications while you are driving. Of course, it could also be a wiring problem, but the LCMs were known to have problems. I think that you could probably get better advice at: [http://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=cfrm](http://www.crownvic.net/ubbthreads/ubbthreads.php?ubb=cfrm)