Wagoneer L6-258 4.2L VIN C 2-bbl (1982)
Cruise Control: Description and Operation
Fig. 6 Electronic cruise control components. 1982-87 models
The Electronic Cruise Command control system regulates cruising speed by the use of a servo unit which uses engine intake manifold vacuum to
regulate throttle position. The servo unit is controlled by an electronic regulator which receives input voltage from a speed sensor. The Electronic Cruise
Command control system consists of the following components.
Control Switch
The control switch is an integral part of the turn signal lever and activates the system.
Regulator
The regulator is an electronic device that senses speed through an electrical signal from the speedometer cable speed sensor. The regulator
has a built in circuit to prevent operation below 30 mph.
Fig. 7 Servo assembly. 1982-87 models
Release System
This system de-energizes the cruise command control system in two ways, electrically and mechanically. Both release systems are activated by
depressing the brake pedal. The mechanical vacuum dump valve directs atmospheric pressure into the servo. The electronic regulator deactivates the
servo by closing the vacuum charge valve and opening the servo vent valve. This release action is caused by current flow through the brake lamps to the
regulator assembly , which signals the solenoid controlled valves in the servo.
Servo
Controlled by the electronic regulator, the servo uses manifold vacuum for diaphragm motion. A bead link chain connects the servo cable to the
throttle linkage.
