Turn the ignition switch OFF. Check for continuity between the No. 1 and No. 4 terminals of the A/C pressure switch. A/C PRESSURE SWITCH Is there continuity? YES - Go to step 7. NO - Go to step 32. Reconnect the A/C pressure switch 4P connector. Disconnect the A/C thermostat 3P connector. Turn the ignition switch ON (II). Measure the voltage between the No. 3 terminal of the A/C thermostat 3P connector and body ground. A/C THERMOSTAT 3P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 11. NO - Repair open in the wire between the No. 14 fuse in the under-dash fuse/relay box and the A/C thermostat.

Measure the voltage between the No. 1 terminal of the A/C thermostat 3P connector and body ground. A/C THERMOSTAT 3P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 12. NO - Repair open in the wire between the A/C pressure switch and the A/C thermostat. Turn the ignition switch OFF. Reconnect the A/C thermostat 3P connector. Make sure the A/C switch is OFF. Turn the ignition switch ON (II). Measure the voltage between the No. 2 terminal of the A/C thermostat 3P connector and body ground with the A/C thermostat 3P connector connected. A/C THERMOSTAT 3P CONNECTOR Wire side of female terminals Is there battery voltage? YES - Go to step 17. NO - Replace the A/C thermostat. aaa