LINE, FUEL 5E2479 - Caterpillar

Fresh Air and Recirculation Air Actuator
Begin by removing the actuator from the air conditioning unit. Refer to the Disassembly and Assembly, "Damper Assembly Motors - Remove and Install" procedure for the proper procedure.
Illustration 1 g00876679
Partial electrical schematicPerform the following tests in order to determine if the actuator is good:
Place the actuator in the full close position and measure the resistance between terminal 4 and terminal 5. If the resistance is approximately 0.75 kOhms, the actuator is good. Proceed to the next test. If the resistance is not approximately 0.75 kOhms, the actuator is bad. Replace the actuator.
Place the actuator in the full open position and measure the resistance between terminal 4 and terminal 5. If the resistance is approximately 5.25 kOhms, the actuator is good. Proceed to the next test. If the resistance is