Electric Rear Windows

Post Sun Oct 22, 2006 2:03 pm

This one's got me baffled.....
I've recently retro-fitted electric rears in my Touring.
They work fine from the switches in the console, irrespective of the cut-off switch position.
They won't work at all from the door switches, irrespective of the cut-off switch, and they won't work without having a switch plugged into the door socket.
All the wires going to the door switches are live, but one of these goes dead with the cut-off switch.
I've tried swapping switches with one that definately works (the electric 'roof switch) and it makes no difference. The 'roof switch illumination works, but it didn't when I plugged it into the door plug.
The two cables (black and blue) going to the motor are permenantly live.

The only thing that may be causing a problem is that the console switches are E36 ones. They have one less earth terminal, so two seperate earths go to that one terminal. Surely this wouldn't cause a problem?? .....And if it does, why isn't it a problem on the front windows?

TIA
Stuart.

Post Sun Oct 22, 2006 2:23 pm

Bit difficult to suss this without knowing your exact wiring diagram, but both wires to the motor should be firmly earthed with the switches " at rest ". This applies to the front windows as well.
Suggests you have the earth and 12V feed to the console switches the wrong way around.
Pin 1 should be earth, and pin 5 supply.

Post Sun Oct 22, 2006 2:38 pm

Thanks Brian, I'll check it out.

Post Sun Oct 22, 2006 4:25 pm

Sorted now.
Brian, thanks for your time - hero as ever.

Changed the wires 'round and all's good now. The switches light-up now too!