Isolation Test

Trouble Isolation Test:

NOTE: This test is to be performed with the Ignition Switch in RUN (engine not running), and the Function Selector in NORM.

Remove the connector from the A/C Compressor Control Relay and measure the voltage to ground at the following terminals of the connector. Turn the Ignition Switch to RUN but do not start the engine.

1. If all voltages are correct, proceed to A/C Compressor Clutch Tests.
2. If Battery voltage is not present at terminal A, check the GAGES Fuse and PNK/BLK wire (39) for an open.
3. If Battery voltage is not present at terminal B proceed to A/C Compressor Control Test. A/C Compressor Clutch Test