"Loren A. Busch" wrote:
>
> Trying to troubleshoot AC in my '90 Westy.  I understand that the AC
> cuts our when the system heats to the point that the radiator fan would
> normally come on.  How do I check to see if that part of the circuit has
> 'turned back on', that is, how do I check to make sure the AC control
> system doesn't think that the fan is running?  What relay?
>
> I realize that a couple of hours with Bentley could probably answer
> this, and another hour finding the possibly offending rely, but if
> someone can steer me directly to the point or points to check it would
> be appreciated.

According to 87.5 in the Bentley, the AC clutch relay is the leftmost
relay behind the D pillar cover (or perhaps in your closet).  If you
don't have +12 at pin 30, your problem is with the high or low pressure
switches or the main AC relay.  If you have power at pin 30, but not pin
87 then you may have a bad signal from the radiator fan area, but it
seems unlikely.
  You do have enough refrigerant pressure to satisfy the low pressure
switch, right?

Larry A.