You said 2 beer long... I'll try that.
Seriously, I have a similar problem. Started with rear door driver side. No windows power and door ajar warning. Lock works fine.
Recently (months later) in front driver door. No windows power (for all windows from this switch) and door ajar warning. Child Lock and lock / Mirror control works fine.
Other windows works fine from there own switch.
I've already tear apart the door and saw no sings of loose wires or corrosion also put dialectic grease.
For the front door:
Motor Option :If the door ajar is linked to the window motor, it make sense the window does not roll down and the door ajar display would show. But would that fail to roll down other windows for the master switch??
Harness option : only If not the window motor.
Anyone have suggestion?