B Series Truck 2WD L4-2184cc 2.2L 2200 2-bbl (1990)
Compressor Clutch Relay: Testing and Inspection
A/C Relay Inspection
1. Disconnect the A/C relay from the cooling unit.
2. Check for continuity between terminals 1 and 3 of the relay with an ohmmeter.
3. Apply 12V to terminal 4 and ground terminal 2.
4. Check for continuity between terminals 3 and 4 with an ohmmeter.
