Have a look at the attached wiring diagram, albeit for a 1994 model car, hopefully there are enough similarities to be useful.
If you short with a small piece of wire pins 1 and 2 on the back of the dimmer switch connector - that's the white (12v from battery) and green-brown (potentiometer out), I guess it is possible that the dimmer switch and the clock controls are sharing power if they are both connected in the back as you say the connection only has three wires on the dimmer side - do your lights come on? if so the problem is within the dimmer switch.
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Please PM if you know of any black 940s being broken! I'm really keen for a driver's door and both front wings! Paint code 19-23
Last edited by James_EG_940; Dec 6th, 2012 at 22:54.
Reason: Added advice back after thinking about it.
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