Grand Cherokee 2WD L6-4.0L VIN S (1997)
Low Fuel Lamp/Indicator: Testing and Inspection
Low Fuel Warning Lamp
The diagnosis found here addresses an inoperative low fuel warning lamp condition. If the problem being diagnosed is related to lamp accuracy, be
certain to confirm the problem is the with the low fuel warning lamp and not with the fuel gauge circuit. See the diagnosis for the Fuel Gauge. If no fuel
gauge problem is found, the following procedure will help to identify a faulty low fuel warning lamp circuit.
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 AIR-BAG DEPLOYMENT AND POSSIBLE
PERSONAL INJURY.
If the low fuel warning lamp fails to light during the bulb
test (about four seconds after the ignition switch is turned to the On position), replace the low fuel warning lamp bulb with a known good unit. If the
indicator lamp still fails to operate, diagnosis of the lamp, the instrument cluster circuitry, the CCD data bus, or the Body Control Module (BCM) should
be performed with a DRB scan tool as described in the proper Computers and Control Systems/Body Control Module/Testing and Inspection Procedure.
Diagnosis of the fuel gauge sending unit and circuit or the Powertrain Control Module (PCM) should be performed with a DRB scan tool.
