Yes, but it gets a little more complicated than that...rmattila wrote:what information drives the compressor clutch? I would guess there's a pressure switch somewhere..?
The logic is like this:
Engine normal temperature, A/C off - no fans
Engine normal temperature, A/C on - both fans slow
Engine hot, A/C off - both fans slow
Engine hot, A/C on - both fans slow
Engine very hot, and/or A/C high pressure - both fans fast
Jaba has previously posted up the A/C wiring diagram, although there are apparently a number of variations on this:
These sketches are a simplified outline of the current flow for the radiator/evaporator fans, if they are legible!
Engine Hot
Engine Very Hot
(I drew them up while I was having some problems with the cooling system).