Yes, it looks like a latch condition could be caused by the AC high
pressure switch being on all the time, whether from an overfill or stuck
switch. Once low speed is triggered by the AC on/off switch or the
radiator temp switch, the voltage is looped back to the relay control
line for 2nd speed fan.The switch is behind the pillar cover with the
rest of the main AC wiring in the left rear passenger compartment. It
has a 2 wire connector to it, both wires should be black/red stripe.

Bentley pages 97.140 and 97.141 show the wiring. Pin 5/6 of the AC relay
is where the 2 circuits are tied together, allowing current to feedback
into the 2nd speed relay control from the output of the same relay,
using a reverse path through the first stage of the fan resistor. Minor
design flaw I'd say but perhaps done for a reason.

Pull the relay in relay panel position 5 and the problem should cease.
Don't run the AC for long like that. Then determine if the AC is
overcharged or the switch is bad.

Mark

Al and Sue Brase wrote:

> Sometimes, over fill of freon will keep the fan on. (a switch on the
> high side line turnsi it on as soon as the compressor starts.
> Al Brase