[Tesky]

My 1980 european 928 (I know, I've said it's a 79 before, but on checking the chassis no. it turns out to be an '80 model!) has A/C fitted but at the moment doesn't seem to operate. When pressing the switch on the dash the switch lights and a relay can be heard to close down in the fuse box. Under the hood however the compressor doesn't seem to engage. I've been told that it runs on a magnetic clutch mechanism. The pulley turns freely so I suspect that the problem lies with the clutch. Could it be a dodgy connection or loose wire somewhere? As usuall any help is much appreciated!