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Home >> Lincoln >> 1997 >> Town Car Signature >> Repair and Diagnosis >> Body & Frame >> Windows >> Power Window System >> Testing >> No Communication With Driver's Door Module

No Communication With Driver's Door Module

  1. Check Power Supply  - Disconnect 4-pin connector from driver's door module. Measure voltage between ground and Black/White wire at 4-pin connector. If battery voltage is not present, go to next step. If battery voltage is present, go to step 4).
  2. Check Black/White Wire For Short  - Remove circuit breaker No. 14 (20-amp) from instrument panel fuse block. Measure resistance between ground and Black/White wire at 4-pin connector. If resistance is greater than 10k/ohms, go to next step. If resistance is less than 10k/ohms, repair Black/White for short to ground and retest.
  3. Check Power At Circuit Breaker No. 14  - Check for battery voltage at input side of circuit breaker No. 14 (20-amp), located in instrument panel fuse block. If battery voltage is present, repair Black/White wire for open. If battery voltage is not present, repair open power supply to engine compartment fuse box. See POWER DISTRIBUTION article in WIRING DIAGRAMS.
  4. Check Ground Circuits  - Disconnect 18-pin connector from driv-er's door module. Measure resistance between ground and Black wire at 18-pin connector. Measure resistance between ground and Black/Light Green wire at 18-pin connector. If resistances are greater than 5 ohms, repair open in Black or Black/Light Green wire and retest. If resistances are less than 5 ohms, see MODULE COMMUNICATIONS NETWORK article for network diagnostics.
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