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.
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HOMESERVICE MANUALSFORD1997EXPLORER 4D UTILITY, 4.0 E, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 40 (MODULE COMMUNICATIONS NETWORK)TESTINGTEST E: 4-WHEEL AIR SUSPENSION (4WAS) MODULE DOES NOT RESPOND TO NGS TESTER
1997 Ford Explorer 4D Utility, 4.0 E, 4WD
Test E: 4-Wheel Air Suspension (4WAS) Module Does Not Respond To NGS Tester
1997 Ford Explorer 4D Utility, 4.0 E, 4WDSECTION Test E: 4-Wheel Air Suspension (4WAS) Module Does Not Respond To NGS Tester
WARNING: This page is about a different car, the 1997 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- Check position of air suspension switch. Switch is located below glove box, above right kick panel. If air suspension switch is on, go to next step. If air suspension switch is off, turn switch on and retest system.
- Turn ignition off. Disconnect 4WAS module Black connector C296 located behind center of instrument panel. See Fig 1 . Inspect connector C296 and Data Link Connector (DLC) C228 for physical damage, bent terminals or corrosion. Repair as necessary and retest system. If connectors are okay, go to next step.
- Measure resistance of Light Blue/White wire between 4WAS module connector C296, terminal No. 29 and DLC C228, terminal No. 7. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Light Blue/White wire between 4WAS module and DLC. Retest system.
- Reconnect 4WAS module connector C296. Perform data link diagnostics. See DATA LINK DIAGNOSTICS under COMMUNICATION NETWORK DIAGNOSTICS. If 4WAS module responds to NGS tester, system is functioning properly. If 4WAS module does not respond to NGS tester, replace 4WAS module and retest system.
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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.