Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSCHEVROLET1998SUBURBAN K2500, 7.4 J, PART TIMEREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 116 (ENGINE CONTROL SYSTEM & COMPONENT TESTS 6.5L DIESEL)FUEL SYSTEMWATER IN FUEL LIGHT DIAGNOSIS
1998 Chevrolet Suburban K2500, 7.4 J, Part Time
Water In Fuel Light Diagnosis
1998 Chevrolet Suburban K2500, 7.4 J, Part TimeSECTION Water In Fuel Light Diagnosis
WARNING: This page is about a different car, the 1998 GMC Pickup, 1998 GMC Cab & Chassis, 1998 Chevrolet Pickup, and 1998 Chevrolet Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch to RUN position. If water in fuel light does not illuminate, go to next step. If water in fuel light illuminates briefly, go to step 5).
- Disconnect water in fuel sensor harness connector. Ensure ignition switch is in RUN position. Using a test light connected to ground, probe ignition feed circuit (Pink wire) at water in fuel sensor harness connector. See Fig 1. If test light illuminates, go to next step. If test light does not illuminate, go to step 6).
- Connect a test light between ignition feed circuit (Pink wire) and ground circuit (Black wire) at water in fuel sensor harness connector. If test light illuminates, go to next step. If test light does not illuminate, go to step 7).
- Using a test light connected to ground, probe indicator light control circuit (Yellow/Black wire) at water in fuel harness connector. If test light does not illuminate, go to step 8). If test light illuminates, replace water in fuel sensor.
- Check for poor connection at water in fuel sensor and instrument cluster. If problem exists, repair as necessary. If problem does not exist, system is functioning properly at this time.
- Repair open in ignition feed circuit (Pink wire) for open, between ENG 1 fuse and water in fuel sensor harness connector.
- Repair open in ground circuit (Black wire).
- Check indicator light control circuit (Yellow/Black wire) for open, between instrument cluster and water in fuel sensor harness connector. If open does not exist, go to next step. If open exists, repair as necessary.
- Check for blown GAUGES fuse. If fuse is blown, repair short to ground in ignition feed circuit (Pink wire) between GAUGES fuse and instrument cluster harness connector. If fuse is not blown, go to next step.
- Check for power to GAUGES fuse. If power exist, go to next step. If power does not exist, repair as necessary.
- Check indicator light ignition feed circuit (Pink wire) for open, between GAUGES fuse and instrument cluster harness connector. If open exists, repair as necessary. If open does not exist, go to next step.
- Repair or replace instrument cluster and/or replace water in fuel indicator light bulb as necessary.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.