Ford Escort
Electronics Engineering
Electrical Engineering

99 Escort AC will not come on Applied voltage directly to clutch an it works great Low pressure sensor tests good What else could be wrong in the circuit?

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Wiki User
2009-08-24 01:45:24

The AC switch and the relay. There is usually a temperature

sensor in the passenger compartment ac unit as well.

These cars have something called the Constant Control Relay

Module (CCRM), a box mounted under where the battery sits. Inside

the CCRM is a relay controlling (I believe) the ground side of the

AC compressor circuit. I have had this module fry on 3 different

Escorts, with these same symptoms. I'll bet that's the problem


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