Re: Power Window Switch operation
Welcome to the garage.
Unfortunately you canīt see what is happening inside the door modules. But switching the rear drivers window from the driver door module, means that one side will get the power and the other side the ground, from the DDM.
But when using the rear door switch itself, it seems that the door switch contacts are shown wrongly. Or the window motor is switched to the DDM driver (with rear door switch relaxed), or it is switched to ground (with the rear door switch actuated).
I have never measured it myself, but i imagine that there is power on both circuits Q14 and Q24 when no switch is touched. Touching the rear door switch, should break one of the power supplies and put that side to ground. Switching to the other side will break the other power supply and put that side to ground. When switching from the DDM, internally the power from one side will be removed and ground supplied to make the circuit complete.
That the window goes down from the rear door switch, but doesnīt go up, AND that nothing works from the DDM, i would say that the Q24 circuit is open between the DDM and the rear door switch. I would have a look inside the drivers door rubber boot for a broken wire. If all seems to be ok, i would measure continuity between pin 4 from the rear door switch and pin 2 of connector C1 on the DDM.