Car: 2005 Dodge Grand Caravan
About this time last year is when this all started. It first surfaced in that when I went to startup the car it started but after about a second it stopped. A few times doing this, it finally stays running. But this is typically the start to a 2 - 5 day odd-symptom period, including the following behavior:
- while driving the speedometer gets stuff at a certain speed
- while driving the cluster indicators can go haywire (i.e. oil pressure says its erroring, airbags indicator blinks, gas gauge goes to empty when its not, etc. basically all of the cluster gauges have mis-reads)
- when I stop the car and take the key out (and even open the door) the radio and the cluster stay "on"
This happens, like I said, for 2 - 5 days and then it goes back to normal after this period. I tried taking it to a mechanic but by the time he looked at it, it went back to the "normal" state and there was nothing to diagnose.
I read the error code (which also goes away when returning back to "normal") and it was a communication error with the cluster control module (I think that's what it is called).
Then yesterday morning, all was just fine. Drove the car in the morning. In the afternoon, I noticed that the dome lights were on and the door ajar indicator was showing an open door (this was new behavior). I turned the ignition on and then off. That behavior went away. Then last night I noticed the dome lights and door ajar were again on. Same thing, I turned ignition on then off and it went away. Sure enough, woke up to a dead battery.
Funny thing: it didn't happen all summer long during the warm months. Not sure if this is related to temperature
Any ideas here? Does it sound like the module itself is just slowly failing?