Cruise Control Module

An electronic controller and electric motor are contained in the cruise control module. The controller monitors vehicle speed and operates the electric motor. In response to the controller, the motor moves a connecting strap that is attached to the cruise control cable. The cable moves the throttle linkage to vary throttle position in order to maintain the desired cruise speed. The cruise control module contains a low speed limit which prevents system engagement below a minimum speed of approximately 25 mph. The module is controlled by switches located on the multifunction lever. Cruise control is in STANDBY DISABLED mode until all conditions inconsistent with cruise control operation are cleared.

With the ignition switch in the RUN position, battery voltage is applied on CKT 341(BRN) to terminal F of the cruise control module. When the cruise ON/OFF slider switch is moved to the ON position, battery voltage is applied on CKT 397 (GRY) to terminal A of the cruise control module connector. If the brake pedal is not depressed, battery voltage is present on CKT 420 (PPL) at module terminal D. If the brake pedal is depressed, battery voltage is present on CKT 17 (WHT) at module terminal G. Terminal G (CKT 17) must have current for cruise control to operate (disable) properly.

When the slider switch is moved to the R/A position. battery voltage is applied on CKT 87 (GRY/BLK) to terminal C of the module. With the SET/COAST switch depressed, battery voltage is present on CKT 84 (DK BLU) at module terminal B. Cruise control module connector terminal K (CKT 817) is the vehicle speed signal terminal. In operation, vehicle speed signal voltage oscillates between a high of battery voltage and a low of 0.5 volts. Ground CKT 1350 (BLK) is at module terminal E. The cruise control module uses terminal J (CKT 396) to signal the PCM that cruise control is engaged. The PCM then determines the correct shift pattern for the transmission. The PCM uses terminal H (CKT 83) to inhibit cruise control operation when conditions not consistent with cruise operation are present. The conditions are listed under Troubleshooting Hints, CRUISE CONTROL INHIBIT CRITERIA.