With Electronic A/C

Try the following checks before diagnosing the Compressor Controls.

1. Check A/C Fuse by visual inspection.
2. Check that A/C Compressor Clutch Connector is firmly seated.
3. Check that Ground G109 is clean and tight.
4. If the EXT TEMP mode indicator is flashing.
5. If A/C Compressor Clutch cycles on and off repeatedly and no cool air comes from the vents, check the cooling fans for proper operation.
Refer to to System Check for a guide to normal operation. Testing and Inspection
Use the System Check Table as a guide to normal operation of the compressor controls. System Check Table
Refer to Isolation Tests to choose the proper diagnostic tests. Isolation Tests