My JGC is equipped with Automatic Door Locks Ė from the owners manual, ďdoor locks will lock automatically if the vehicle speed is above 15 mph and all doors are closedĒ.
Iím driving down the road at about 45 mph, the door locks locked way long ago, and all of a sudden, I hear the door locks lock again, and the interior lights go on. It sounds exactly as if it had just reached the 15 mph and was locking the doors. Then, the lights go out and then they flash on again, at the same time I hear the door locks attempting to lock again (they are already locked). This cycle happens about three times, and then the interior lights stay on. Each time the doors attempt to lock and the interior lights go on or off, I hear a clicking Ė to me, it sounds like a relay, but Iím guessing. So Iím driving down the road with the interior lights on.
I start manually pressing the power lock and unlock button on the driverís side door in an attempt to get the interior lights out. No joy. I use the key fob (remote) in an attempt to do the same thing. Still no joy Ė lights on.
I get to my destination, get out of the car, and use the power lock button to lock all the doors and close the doors. The interior lights are still on. I use the remote, locking, unlocking, rinse and repeat. The interior lights are still on. After about 30 seconds, with the vehicle parked and locked, the interior lights go out.
This was yesterday, and itís been doing this off and on business intermittently.
So now Iím wondering where the relationship between the interior lights and the door locks is Ė is it a relay that they have in common? Iím reading the owners manual and thereís no indication of a fuse or relay that ties the two together, but there must be one. Thereís no mention of this feature (automatic lock @ 15 mph) in the FSM Ė at least that I can find. I have the wiring diagrams and still cannot find a link between the two.
Okay, last piece of information and I may be stretching it here; a ďwhile agoĒ, I started having problems with Overdrive. The check engine light came on and threw a P0783 code. This code primarily points to the governor/solenoid in the transmission, but basically indicates that thereís a problem with the circuit, and the OD circuit doesnít think that the driveshaft is at the proper rpm to shift into OD. So in other words, Iím driving down the road, and after the transmission fluid warms up, I stop shifting into overdrive, and am basically driving in 4th. Iíve been watching the tachometer and itís as predicable as sunrise. Itís a problem Iíll get to when I get the b*lls to drop the transmission pan and try to replace the governor/solenoid assembly.
The only reason I bring up this last point is because they both seem to be related to vehicle speed. So Iím wondering if there may be sensor (VSS, Transmission Speed Sensor, etc.) that may be the root of both problems.
Any thoughts? Where should my efforts be focused? Iíd have to have to just remove the interior lights fuse and leave them off, and Iím not capable of pulling off a door panel to search for a broken wire. So any hints would be greatly appreciated.