Speed Control Is Inoperative

1. Apply brake pedal and ensure brake lights work. If found satisfactory, proceed to step 2. If not found satisfactory, check stop lamp circuit.
2. Check to ensure proper operation of clutch deactivator switch (manual transmission only). If found satisfactory, proceed to step 3. If not found satisfactory, service or replace as necessary.
3. Check to ensure proper operation of actuator lever and throttle linkage. If found satisfactory, proceed to step 4. If not found satisfactory, service or replace actuator lever and throttle linkage.
4. Check to ensure proper vacuum at actuator. If found satisfactory, proceed to step 5. If not found satisfactory, service or replace vacuum hose and vacuum dump valve.
5. Perform tests on control switches and circuit. If found satisfactory, proceed to step 6. If not found satisfactory, service or replace switches and circuits.
6. Perform tests on servo. If found satisfactory, proceed to step 7. If not found satisfactory, replace servo.
7. Perform tests on speed sensor. If found satisfactory, proceed to step 8. If not found satisfactory, replace speed sensor.
8. Perform tests on amplifier. If found satisfactory, proceed to step 9. If not found satisfactory, replace amplifier.
9. Examine all connectors to ensure proper contacts.