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.
Normal Operation
The speed control actuator is powered through circuit 601 (LB/PK) and is grounded through circuit 1205 (BK). The driver command input signals are activated from the speed control switches through circuit 151 (LB/BK) and 848 (DG/OG). When these inputs are received by the speed control actuator, a stepper motor is prompted to pull the throttle through a speed control cable to maintain the selected speed. When the brake pedal is applied, the stoplamp switch closes as the primary deactivation. The speed control deactivator switch may open as the secondary deactivation if the brake pedal is applied past the stoplamp switch trip point. The speed control actuator then releases the throttle, sending the actuator into sleep mode until the speed control resume or set switch is pressed or the speed control is switched off or the ignition is turned off.
NO RELATED
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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.