The RR window on my W126 will power up and down when I connect a battery directly to the motor. Through my switches (both on the rear door and in console) will only power it up. I have tried 3 different switches on the door and none of them will power window down. Surely this is a switch issue, but strange that it would be the same switch issue on 3 different ones (plus the one in the console). Can anyone shed any light on this? Thanks.