Speed Will Not Set In System

1. Check for proper throttle linkage operation. If satisfactory, proceed to step 2. If not satisfactory, adjust or replace as necessary.
2. Check for proper operation of control switch and system circuits. If satisfactory, proceed to step 3. If not satisfactory, service or replace as necessary.
3. Check for proper vacuum dump valve operation. If satisfactory, proceed to step 4. If not satisfactory, service or replace as necessary.
4. Check stop lamp switch and lamp operation. If satisfactory, proceed to step 5. If not satisfactory, replace switch.
5. Check clutch switch operation. If satisfactory, proceed to step 6. If not satisfactory, replace switch.
6. Check to ensure proper operation of servo. If satisfactory, proceed to step 7. If not satisfactory, replace servo.
7. Check for proper speed sensor operation. If satisfactory, proceed to step 8. If not satisfactory, replace sensor.
8. Replace amplifier with known good amplifier. If system operation is satisfactory, replace amplifier. If system operation is still not satisfactory, ensure all system electrical connectors have proper contact.