The vacuum controlled cruise control system consists of the following components:
The throttle actuator is mounted in the engine compartment and is connected to the throttle linkage with an actuator cable. The speed control amplifier regulates the throttle actuator to keep the requested speed. When the brake pedal is depressed, an electrical signal from the stoplamp switch returns the system to stand-by mode. The vacuum dump valve also mechanically releases the vacuum in the throttle actuator, thus releasing the throttle independently of the amplifier control. This feature is used as a safety backup.
| Fig. 1: Cruise control system components — Pickup
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| Fig. 2: Cruise control system components — Navajo
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| Fig. 3: The cruise control actuator unit is mounted
on top of the right side strut tower in the engine compartment of the
MPV
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