## Air Conditioning

#### A/C Pressure Switch Circuit Troubleshooting (cont'd)

21-22

1. Turn the ignition switch OFF.

1. 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.

1. Reconnect the A/C pressure switch 4P connector.

1. Disconnect the A/C thermostat 3P connector.

1. Turn the ignition switch ON (II).

1. 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.

1. 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.

1. Turn the ignition switch OFF.

1. Reconnect the A/C thermostat 3P connector.

1. Make sure the A/C switch is OFF.

1. Turn the ignition switch ON (II).

1. 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.

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