Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1986AEROSTAR V6-183 3.0LREPAIR AND DIAGNOSISCRUISE CONTROLTESTING AND INSPECTIONSYMPTOM RELATED DIAGNOSTIC PROCEDURESLESS RESUMESPEED CONTROL IS INOPERATIVE
1986 Ford Aerostar V6-183 3.0L
Speed Control Is Inoperative
1986 Ford Aerostar V6-183 3.0LSECTION 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.
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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.