Testing and Inspection for HVAC Control Assembly on C 2500 Truck 2WD V8-454
Control Assembly: Component Tests and General Diagnostics
Test the controller circuits if system operation indicates a malfunction. Test by removing the controller from the IP and the cover from the back of the
controller connector. This will permit insertion of the test probes from the back side of the connector. Use a digital volt or digital multimeter to test the
controller. Do not use an analog meter to test the controller.