300 M

[CaptainBly]

2004 chrysler 300M about 110,000 miles

I noticed the interior lights were on and checked the doors and the switch all were good. Then I heard the sound of unlocking doors and the lights were flashing like when you unlock the car with the remote. Just wondering if there is relay going bad or something.

[jeffreyd]

check the car battery could be going bad or low enough that it is just enough to send a signal.

[Big Buck Buster]

I have had the switch in one of the doors do this same thing. There are switches in the latch assembly that tell the BCM if/which door is ajar. Using a scan tool will tell you which one is bad.

[CaptainBly]

BCM-body control module?

[Jeremy airjer W]

corect on the BCM

Typically the door ajar light will be on if a switch is bad.

Did you have the key FOB (remote) in your possession when this happened? I had a corvette with a similar symptom with the key FOB present. The found was continuously transmitting the unlock signal.

[CaptainBly]

Yes they were in the ignition. I ended up pulling the fuse for the locks, so it wouldn't drain the battery. The fuse was also for the BCM, can a person still drive it. Not really sure what the BCM does.

[Jeremy airjer W]

Put the fuse back in, pull the battery out of the key fob, and see if it still does it.

The BCM controls the headlights, horn, wipers, climate control, windows, locks, etc.

[Shack]

My first guess also would be some sort of key fob issue. If I ever saw a cheaper made key fob than Chrysler's fob from that era, I would think who ever designed it was/is nuts.

Can not remember perfectly which one (Ford or Chrysler), but one of them had this issue on a couple models and the door ajar switch was the cause. It did not trigger a door ajar light though while parked or driving. Might be worth spraying some penetrate lube up into all four door latches and opening and closing all the doors about 10 times. Worth a shot and good preventive maintenance. Also,just to rule it out, replace the battery in the fob. Good call on testing the cars battery. Testing the cars battery is a good suggestion, especially on Chrysler's with weird random electrical issues.

[CaptainBly]

My wife said that the fob that she was using didn't work yesterday, so I gave her the other one to use. I figured a dead battery. I tried the second one everything seemed to be working fine. Until later in the afternoon, then the locks were trying to unlock and the lights flashed like usual when unlocking the car with the fob. That's why the interior lights were on. They nenver got a chance to shut off, because the car was always unlocking itself. I will take both batteries out when the wife gets home tonight. Thanks

[CaptainBly]

Earlier I took apart the fob that didn't work. The wife came home and I put the fuse back in and everything seemed normal. I also took out the battery of the one that was working. Put everything back together and still normal. Guessing it was the first fob that was sending a signal due to a low battery maybe. We'll see what happens. Thanks.