I detached both sliding doors wiring harnesses ( they are manual and not powered ) waited until it was dark, and checked out the odometer. the odo lighted up as it should when the door was opened, and went off shortly after with no key in the ignition. after the odo went to sleep, I could not see the heaters on. on this vehicle they made the facia where the numbers are a dark , almost black see through plastic. they may in fact be on, but with the dark face I cannot see them. I still think you are onto something. will update when part arrives. im rolling the dice that it is not defective ( used cluster) as new ones are not available. (a new one would cost too much anyways) QUESTION - do you think it is safe to use a multi meter to test the BCM circut you mentioned. I dont want to ground out the BCM and then have a bigger problem. when you mention circuit shall be low, that term means the circut is a ground rather than a power, correct ?Yup, that's not a Chrysler diagram.
Before anything else, simply sit in the driver's seat with ignition off and observe the odometer readout heaters once all the doors are closed - does it go off after ~30 sec and wake up a second later?
Before digging into the cluster, I'd verify that BCM is operating correctly (not sending wake up signal)...
"VERIFY CONTINUITY OF WAKE UP CIRCUIT FROM BCM TO MIC. CIRCUIT SHALL BE LOW WHENEVER BCM IS AWAKE."
This will also allow you to test if there's an internal cluster timer or BCM is the only control.
The wire is pin 12 of the cluster connector and connector 4, pin 5 at BCM (VT/BR, 22ga).
More than likely BCM is sensing a 'wake up' event (door trigger or pci message) and powering on the cluster to get it 'ready'.
Sliders have the "chain of death" - the flexible wire harness that flexes every time the door is operated and thus are prone to failure.