D250 3/4 Ton Pickup 2WD V8-318 5.2L VIN Y FI (1988)
Compressor Clutch Relay: Description and Operation
The A/C clutch relay is connected to the A/C damped pressure switch, the A/C switch and the A/C fan relay. The relay is in the On position during
normal engine operation, but is closed when the SMEC senses low idle speeds or wide open throttle conditions, preventing A/C clutch engagement.
