2022 Pro, Interior Lights Stay On; BCM Replacement?

Ok what confuses me is, with the fuse back in, front overhead are stuck on, and door open (or closed): when I switch the rear dome to “ON” instead of “DOOR”, the rear dome light goes OFF.

in that diagram, is the pink wire 15 always energized?

 

For 20 min after engine off, unless doors are opened/closed or switch is cycled. Timer starts again.

 

What position is the "rear" lamp in when this happens?

 

Like you said, the rear dome switch is only two positions: DOOR or ON. When the switch is in the DOOR position, regardless of the doors open or closed, the dome light is on, front overheads on. When the rear dome switch is in the ON position, regardless of doors open, the rear dome light is OFF and front overheads remain on.

 

Try this test, remove the rear lamp, don't touch the switch. See what you get. Report back.

 

Actually tried that a min ago but tried again. No change to the front overheads regardless of door or switch position. This is just removing the bulb and testing, that is.

 

OK, so no change. Leave rear lamp in. Remove map lamps (both). Test both switches. Door open/closed also.

 

No change. I did all scenarios, the overheads remain illuminated.
You meant remove the overhead bulbs themselves right?

 

Maps lamps (bulbs) front ones.

 

Yes, no change under all conditions. I’m rechecking the pins you mentioned a while back now that I have the overhead console removed again.

 

Just to confirm, Pin 15 and 22, 0 V.

 

Do 15 to ground (12). 22 is PWM ground. (dimming)

 

If you have some wire, make 2 jumpers. One for 15 to the removed lamp. (I'd use the rear lamp) and the other to 22. Open & close a door. See that it functions the way it should.
P.S. Probe the wire side for this. Those pins are delicate.

 

Random update: previously, I basically gave up on troubleshooting this. I just removed the fuse and bulbs, went on. I thought I would see about troubleshooting this again, so I installed fuse, bulbs - now the lights don't come on at all (bulbs LOOK fine but still need to verify).

I think at this point I need to order a replacement overhead console and try that...