Electrical problem

[Paul Fraser]

OK, originally I had a problem with an intermittent blower in my '86 944 which eventually stopped working alltogether. Now the windscreen wipers have also stopped working. Have checked fuses and wiggled/refit relay. Also had the wipers work for a second or two after this.
Does this suggest an ignition barrel problem, immobiliser problem or something else, thanks?

 

[mr brightside]

Hi Paul, the haynes manual drawings for this year car are so bad it's almost criminal but the two systems you mentioned faults with seem to share a common supply from the ignition column. Check for a supply on the red/black wire at the blower motor, the resistance shunts for speed changes are on the ground side so the +ve supply is uninterrupted by other components. The same supply enables the heated rear screen does that work? I can't find exactly where on the column it comes from it's really frustrating the way the schematic's been drawn.

 

[Paul Fraser]

Belated thanks for your help. What I know doesn't work is the blower, windscreen wipers and electrical windows. Need to check the others. Have rechecked the fuses, the wiper relay (swapped this out from another car) and also tried changing the ignition switch at the bottom of the barrel. Do you know the colour of the wire that is supposed to supply from the ignition as I have access to that at the moment? BTW Well done on getting even that much information from the Haynes. I've looked at that and the Workshop manuals and didn't even get that far: so much for having a Physics degree...