General Ducato Van Driver’s Side Electric Window Problem

[rupz]

Hello,

Ref: 2003 DUCATO J.T.D. 11 VAN.

I have a problem with the driver’s side electric window. It will go down, but not up.

Trouble shooting I’ve done already…
1/ Slaved another good door switch in, same problem.
2/ Powered window regulator motor direct with 12v DC, window goes back up fine.
3/ Slaved relay from heater fan (same part number) into window circuit still same problem.

Can anyone help me with a circuit diagram or perhaps describe how the system works.

Many thanks

Lee.