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.
Test D: No Communication With Central Security Module
2003 Ford Windstar BaseSECTION Test D: No Communication With Central Security Module
WARNING: This page is about a different car, the 2002 Ford Pickup. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
After making any repairs, retest system for proper operation.
- Turn ignition switch to LOCK position. Disconnect Central Security Module harness connector C274a. Disconnect CSM module harness connector C274b. Turn ignition switch to RUN position. Measure voltage between ground and CSM module harness connector C274b terminal No. 25 (Red/Yellow wire). See Fig 1. Measure voltage between ground and CSM module harness connector C274a terminal No. 12 (Black/White wire). See Fig 2. If battery voltage exists, go to next step. If battery voltage does not exist, repair open in appropriate wire between central junction box and CSM. See WIRING DIAGRAMS .
- Turn ignition switch to LOCK position. Measure resistance between ground and CSM module harness connector C274b terminal No. 13 (Black/Light Blue wire). If resistance is 5 ohms or less, diagnose network fault. See MODULE COMMUNICATIONS NETWORK - F150 PICKUP article. If resistance is more than 5 ohms, repair open in Black/Light Blue wire between CSM module and ground. Ground point is located behind left kick panel. See WIRING DIAGRAMS .
RENDER: 1.0x
NO RELATED
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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.