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.

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.

• Brakes feel soft, pull hard to one side, or make grinding noises.

• The engine overheats, stalls repeatedly, or misfires under load.

• You are missing required tools, torque specs, or safe lifting equipment.

• You are not confident in the next step or safety outcome.

Safety Warning

Speed Control Is Inoperative

Use the Manual With the Right Hardware

When to See a Mechanic

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