Description & Operation

Throttle plate position is controlled by vacuum-powered actuator mounted on engine compartment firewall. Vacuum supply to actuator is controlled by valve and pump assembly that contains a vacuum pump motor, vent valve and safety valve. See ELECTRICAL COMPONENT LOCATIONS  . Valve and pump assembly receives commands from solid-state cruise control unit. Cruise control unit receives inputs from the following components:

• Main Switch On Instrument Panel
• Cruise Control Main Relay
• Control Switch (Sub-Switch) Containing RESUME And SET Switches (And CANCEL Switch On Vehicles With Air Bag)
• SFI Control Unit (Provides Engine RPM Signal)
• Brakelight Switch
• Inhibitor Relay (A/T)
• Clutch Switch (M/T).