RAM 2500 Truck 2WD V8-5.9L VIN Z (1997)
Compressor Clutch Relay: Description and Operation
Compressor Clutch Relay
The compressor clutch relay is a International Standards Organization (ISO) micro-relay The terminal designations and functions are the same as a
conventional ISO relay However, the micro-relay terminal orientation (footprint) is different, the current capacity is lower and the relay case dimensions
are smaller than on the conventional ISO relay.
The compressor clutch relay is a electromechanical device that switches current to the compressor clutch coil when the Powertrain Control Module
(PCM) grounds the coil side of the relay The PCM responds to inputs from the heater-A/C mode control switch, the low pressure cycling clutch switch,
and the high pressure cut-off switch.
The compressor clutch relay is located in the Power Distribution Center (PDC) in the engine compartment. Refer to the PDC label for relay identification
and location.
