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Ignition Key Disarm

  1. On all models, arm the alarm system from inside the vehicle. Turn ignition key to ACC or RUN position, then to OFF position. Open vehicle door. If warning light blinks, ignition disarm sequence is okay. If alarm triggers, use door key to stop alarm, then go to step 2).
  2. On Continental and Mark VII, check voltage at terminal "K", circuit No. 296 (White/Purple) wire of control module with ignition switch in RUN or ACC position. If reading is more than 9 volts, replace control module and retest system. If reading is less than 2 volts, check ignition switch or circuit No. 296 (White/Purple) wire for open circuit.
  3. On Town Car, check voltage at terminal No. 4, circuit No. 59 (Dark Green/Purple) wire of control module with ignition switch in RUN or ACC position. If reading is more than 9 volts, replace control module and retest system. If reading is less than 2 volts, check ignition switch or circuit No. 59 for open circuit.
  4. On Cougar and Thunderbird, check voltage at terminal No. 4, circuit No. 296 (White/Pink) wire of control module with ignition switch in RUN or ACC position. If reading is more than 9 volts, replace control module and retest system. If reading less than 2 volts, check ignition switch or circuit No. 296 (White/Pink) wire for open circuit
  5. On Town Car, disarm alarm system with door key. Lock doors with electric door lock switch. Unlock driver's door with keyless entry code and ensure that doors unlock. If driver's door unlocks, go to step 7). If driver's door does not unlock, see KEYLESS ENTRY SYSTEM article.
  6. On Cougar and Thunderbird, check for a momentary battery voltage signal at terminal No. 8, circuit No. 163 (Red/Orange) wire of control module while driver's door is being unlocked with keyless entry code. If battery voltage signal is present, replace control module and retest system. If no signal is present, check circuit No. 163 (Red/Orange) wire.
  7. Check for a momentary battery voltage signal at pin No. 8 of control module when keyless entry code is entered. If momentary battery voltage signal is present, replace control module. If battery voltage signal is not present, check circuit No. 163 (Red/Orange) wire.
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