Grand Cherokee 2WD L6-4.0L VIN S (1997)
Cruise Control Indicator Lamp: Testing and Inspection
Cruise-On Indicator Lamp
The diagnosis found here addresses an inoperative lamp condition. If the problem being diagnosed is an inaccurate cruise-on indicator lamp, refer to
Vehicle Speed Control and/or to the proper Powertrain Management/Computers and Control Systems/Testing and Inspection/Diagnostic Charts
Procedures for diagnosis.
WARNING: ON VEHICLES EQUIPPED WITH AIR-BAGS, REFER TO AIR BAGS AND SEAT BELTS/AIR BAGS BEFORE
ATTEMPTING STEERING WHEEL, STEERING COLUMN, OR INSTRUMENT PANEL COMPONENT DIAGNOSIS OR SERVICE.
FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
If the cruise-on indicator lamp fails to light during the bulb test (about four seconds after the ignition switch is turned to the On position), replace the
cruise-on indicator lamp bulb with a known good unit. If the cruise-on lamp still fails to operate, diagnosis of the lamp, the instrument cluster circuitry,
and the CCD data bus should be performed with a DRB scan tool. Diagnosis of the speed control switches and circuits and/or Powertrain Control
Module (PCM) should be performed with a DRB scan tool.
