In the computer-less windows the rear windows' door switches are in series with the front switches for same. If EITHER switch is wonky then the window won't work right. There are only two wires to the motor. One ends up hot and the other ends up grounded in order to make the motor run. I.e., both wires are switched simultaneously. Ample opportunity for something to go wrong within either of the switches. IIRC the resting state of both motor wires is hot. If true, that's a good diagnostic step, though you have to disconnect the motor to prove that this is the case. (If you don't both sides will look hot even if only one is, because the minuscule metering current will run through the motor.)
Rare that a wire goes bad, except for the ones going through the hinge. You have to look at a schematic in order to theorize what single failure could cause any observed symptoms. That and a multimeter and you should be able to figure it out. Barring trauma, it's one of: fuse, dirty switch, or broken hinge wire. At least, initially. It's also entirely possible to make things worse while trying to fix it. -- Jim _______________________________________ http://www.okiebenz.com To search list archives http://www.okiebenz.com/archive/ To Unsubscribe or change delivery options go to: http://mail.okiebenz.com/mailman/listinfo/mercedes_okiebenz.com
