A/C Systems - 4000 series

[Huw Powell]

> >All the wiring diagrams I have seen show multiple electrical controls >that
> >I
> >cannot find. I wonder if I can ask those who have had the panels off >their
> >84-86 4000s or Urqs with A/C to respond to these questions:
> 
> That's what I'm trying to do!
> 
> >1) Where are the A/C relays.  I know that there is supposed to be one in
> >position 11 in the main fuse box. The wiring diagrams show compressor
> > >clutch
> >relays as well?
> 
> Yes, number 11 in the fuse box is the right location for the first relay. If
> this one is missing, then this is your problem. The compressor clutch relay
> is underneath the dashboard on the driver's side, behind the small glove
> box.

#6 is an AC relay as well, I think it serves a cutout function.

> 
> >2) There is an A/C thermostat and microswitch marked on several wiring
> >diagrams I have seen.  But there is no reference to their existence
> > >anywhere
> >else in the Bentley or the Euro workshop manual I have obtained?
> 
> IF they exist, they should be at the same place as the compressor clutch
> relay.

I think they are buried behind the glove box, attached to the condenser.

Remember, I consider all this stuff to be redundant extra weight, so I'm
not exactly an expert on AC!

-- 
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/