2000 Chevrolet Truck Repair Question
Check actuator electrical circuits, voltage and ground. In the diagram, black wire is chassis ground. Use a testlite connected to battery voltage touch terminal for black wire on wiring harness. If the lite comes on, ground is good. Brown wire is voltage, goes hot with key on. Actually, you could use testlite between black and brown wire terminals, key on, If lites comes on bright, voltage and ground should be ok. The other wire goes to hvac control. Other than a continuity test, not sure how to test that wire? Let us know what you find.
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