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Test C: No Communication With Rap Module

  1. Turn ignition off. Check condition of central junction box ROOM fuse (10-amp) and RADIO fuse (5-amp) located above left side kick panel. If fuses are okay, reinstall fuses and go to step  4 . If ROOM fuse is not okay, go to next step. If RADIO fuse is not okay, go to step  3 .
  2. Disconnect RAP module Gray 22-pin connector C404 located in rear of luggage compartment, behind right trim panel. Replace instrument panel fuse block ROOM fuse (10-amp). Check condition of replaced ROOM fuse. If fuse is okay, replace RAP module. Retest system operation. If fuse is not okay, repair short to ground in Blue/Red wire between central junction box ROOM fuse and RAP module. Retest system operation.
  3. Disconnect RAP module Gray 26-pin connector C405 located in luggage compartment, behind right trim panel. Replace instrument panel fuse block RADIO fuse (5-amp). Turn ignition switch to ON position. Check condition of RADIO fuse. If fuse is okay, replace RAP module. Retest system operation. If fuse is not okay, repair short to ground in Blue/Black wire between instrument panel fuse block and RAP module. Retest system operation.
  4. Turn ignition off. Disconnect RAP module Gray 22-pin connector C404 located in luggage compartment, behind right trim panel. On 4-door remote system, check resistance between ground and RAP module 22-pin connector C404 terminal No. 14 (Black wire). See Figure . On driver door only systems, measure resistance between ground and RAP module 26-pin connector C405 terminal No. 24. See Figure . On all models, if resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Black wire between RAP module and ground. Retest system operation.
  5. Measure voltage between ground and RAP module 22-pin connector C404 terminal No. 12 (Blue/Red wire). See Figure . If is more than 10 volts exists, go to next step. If 10 volts or less exists, repair Blue/Red wire between central junction box and RAP module. Retest system operation.
  6. Disconnect RAP module Gray 26-pin connector C405 located in luggage compartment, behind right trim panel. Measure voltage between ground and RAP module 26-pin connector C405 terminal No. 25 (Blue/Black wire). See Figure . If more than 10 volts exists, repair module communications concern. See MODULE COMMUNICATIONS NETWORK - ESCORT article. If 10 volts or less exists, repair Blue/Black wire between central junction box and RAP module. Retest system operation.
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