Speed Control Is Inoperative

1. Blow the horn. If found satisfactory, proceed to step 2. If not found satisfactory, check horn circuit.
2. Apply brake pedal and ensure brake lights work. If found satisfactory, proceed to step 3. If not found satisfactory, check stop lamp circuit.
3. Check adjustment of throttle linkage bead chain. If found satisfactory, proceed to step 4. If not found satisfactory, service or replace throttle linkage bead chain.
4. Check to ensure proper operation of actuator lever and throttle linkage. If found satisfactory, proceed to step 5. If not found satisfactory, service or replace actuator lever and throttle linkage.
5. Check to ensure proper vacuum at actuator. If found satisfactory, proceed to step 6. If not found satisfactory, check or replace vacuum hose.
6. Perform tests on control switches and circuits. If found satisfactory proceed to step 7. If not found satisfactory, service or replace switch and circuits.
7. Perform tests on actuator. If found satisfactory, proceed to step 8. If not found satisfactory, replace actuator.
8. Perform tests on sensor. If found satisfactory, proceed to step 9. If not found satisfactory, replace sensor.
9. Perform tests on amplifier. If found satisfactory, proceed to step 10. If not found satisfactory, replace amplifier.
10. Examine all connectors to ensure proper contacts.