The 1984 Corvette's AC system relies heavily on the following:
* The AC compressor clutch: This is the primary on/off switch for the compressor. It's electrically controlled, but the "relay" function is built into the system's circuitry and often within the climate control module or related wiring harness. It's not a separate, easily swappable relay like you'd find in other circuits.
* The climate control head unit: This unit receives inputs from various sensors (temperature, blower speed, etc.) and sends signals to control the compressor clutch, blower motor, and other components. Any failure here could prevent the AC from working.
* The blower motor resistor: This controls the blower motor speed, and a faulty resistor can indirectly affect AC performance if the blower isn't functioning properly.
To troubleshoot AC problems on a 1984 Corvette, you'll need to use a wiring diagram and likely a multimeter to test the compressor clutch circuit, the signals from the climate control head unit, and the blower motor circuit. Simply looking for a single "AC relay" won't solve the problem. You'll need a Corvette-specific wiring diagram for your year to trace the AC circuit.
