The idle-up is coming off the same wire that activates the compressor
clutch.  Bad connections to or from clutch or the clutch is toast.

d

At 06:24 PM 6/14/2015, Raymond Markett wrote:
>David,
>
>Using your advice I checked the fuses. None where blown, but some
>had oxidized contacts.  I clean and/or replaced the contacts and
>fuses. Now when she's warmed up I get and increase in idle speed and
>radiator fan speed when I crank up the A/C.  Still no action at the
>compressor. I would expect it to cycle occasionally even if the
>refrigerant is low, but I don't know if  that is how it's designed.
>I plan to check voltage at the compressor, and try to determine if
>there is enough refrigerant in the system to keep the pressure
>switches happy.  Ironically, the afternoon heat is making me call it
>a day but I plan to get back to it next week. Any additional advice
>would be appreciated.
>
>Thanks,
>
>Raymond
>
>Sent from my iPhone
>
> > On Jun 13, 2015, at 10:31 PM, David Beierl <dbeierl@ATTGLOBAL.NET> wrote:
> >
> > Schematic for '84/5 is on 97.137-8.  It refers to S7 and S10, both of
> > which are located on 97.66 for the '85.  S7 is the radiator fan fuse
> > and the A/C page wiring replaces that on 97.66. S10 comes from the
> > load reduction relay so that power to the A/C control system is only
> > available when ignition is on and not cranking.
> >
> > Blowers running means S10, S15, Evap blower relay, input side of evap
> > fan switch are all good.  Turning evap fan switch on powers the A/C
> > thermostat and *also* activates the radiator/condensor cooling fan
> > relay, operating the radiator fan on high speed through S14.  When
> > the thermostat is closed it feeds the normally-closed compressor
> > cut-out relay  and thence the compressor clutch and idle-up
> > switch.  The radiator fan is already running at high speed, but if
> > the radiator thermo-switch should call for high fan, the compressor
> > cut-out relay will activate and dump the compressor.
> >
> > Yours,
> > David
> >
> > At 03:31 PM 6/13/2015, Raymond Markett wrote:
> >> Hi All,
> >>
> >> The A/C compressor on my 1985 Westy doesn't turn. The compressor
> >> clutch doesn't even attempt to engage.  The blower in the A/C
> >> cabinet runs, but that seems to be it. I don't hear any change in
> >> the radiator fan when the A/C is turned on. I looked in the Bentley
> >> but the A/C section covers 1986 and later.
> >>
> >> Is anyone out there familiar with the 1985 A/C system, or have the
> >> electrical and mechanical manual?
> >>
> >> I'm trying to find out where the fuses, relays, etc. are located for
> >> the 1985 year. I see the 1986 has some electrics in the D pillar
> >> behind the cabinet. Does the 1985 have the same arrangement?  If so,
> >> are there any external test points where one could use a volt/ohm
> >> meter to test the hidden electrics before dismantling the cabinets
> >> to gain access?
> >>
> >> Thanks,
> >>
> >> Raymond
> >>
> >> Sent from my iPhone