Cruise Control System: Testing: Actuator

Disconnect connector from actuator lead wire. Check actuator resistance. Using an ohmmeter, measure the resistance between terminals 1-3 and 2-3. Resistance should be approximately 70 ohms between 1-3 and 30 ohms between 2-3.
Disconnect carburetor throttle rod from bell crank. Start engine and check actuator operation. Check that the diaphragm makes a smooth reciprocating motion when either power is applied to terminals 1-2 with actuator terminal 3 grounded to the body or, power is removed from only terminal 2.
Confirm that the cable does not return easily when pulled with 4-7 lb. (2-3 kg.) of force. Check that the vacuum hose is connected. If the operation is not as specified, replace the actuator.