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Pinpoint Test A - Doors Do Not Lock Or Unlock From Remote Transmitter

WARNING: This page is about a different car, the 1995 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.
  1. Attempt to lock and unlock each door several times with the power door lock switch. If power door locks operate properly, go to next step. If either lock does not operate properly, go to DOOR LOCKS & TRUNK RELEASE - POWER article in the ACCESSORIES/SAFETY EQUIPMENT section.
  2. Sit in vehicle with both doors closed. Turn ignition on, then off. Attempt to turn interior lights on with dimmer switch. Open trunk door. If interior and trunk lights come on, go to next step. If interior and trunk lights do not come on, repair appropriate circuits.
  3. Turn ignition on. Insert shorting plug into program connector, located on left side of Remote Keyless Entry Module (RKEM). If doors lock and unlock, go to next step. If doors do not lock and unlock, go to step 15).
  4. Remove shorting plug from RKEM. Turn ignition off. Close both doors, leaving them unlocked. Press LOCK button on remote transmitter which has been programmed into RKEM. It may be necessary to press LOCK button several times. Observe anti-theft indicator (if equipped). If doors lock and anti-theft indicator comes on for 30 seconds, go to next step. If response is not as described, go to step 13).
  5. Turn ignition off. Close and lock doors. Press UNLOCK button on remote transmitter. On vehicles with anti-theft system, open driver's door. On all models, if door unlocks, go to next step. If door does not unlock, temporarily substitute known good RKEM, then retest system.
  6. Press UNLOCK button on remote transmitter twice within 5 seconds. If doors unlock, go to next step. If doors do not unlock, temporarily substitute known good RKEM, then retest system.
  7. Press PANIC button on remote transmitter. If horn sounds and parking lights flash continuously, go to next step. If response is not as described, repair lights or horn circuit as necessary.
  8. Go to next step if only one remote transmitter is available. Wait until at least 3 minutes have elapsed since horn sounded and parking lights flashed. Repeat step 7), using second remote transmitter. Press PANIC button on second remote transmitter. If horn and parking lights shut off, go to next step. If horn and parking lights do not shut off, temporarily substitute known good RKEM, then retest system.
  9. Wait until at least 3 minutes have elapsed since horn sounded and parking lights flashed. Repeat step 7), using the same transmitter that was used in step 7). Press PANIC button on second remote transmitter. If horn and parking lights shut off, go to next step. If horn and parking lights do not shut off, temporarily substitute known good RKEM, then retest system.
  10. Press PANIC button. Turn ignition on. If horn and parking lights shut off, go to next step. If horn and parking lights do not shut off, temporarily substitute known good RKEM, then retest system.
  11. Turn ignition off. Close both doors, leaving them unlocked. Press LOCK button on remote transmitter twice within 5 seconds. If horn sounds and parking lights flash continuously, go to next step. If response is not as described, temporarily substitute known good RKEM, then retest system.
  12. Turn ignition on. Close both doors, leaving them locked. Close and latch trunk. Press UNLOCK button on remote transmitter. If either door unlocks, temporarily substitute known good RKEM. If neither door unlocks, system is okay.
  13. Open trunk. Ensure antenna is connected properly. Disconnect antenna from RKEM. Inspect antenna for damage, especially in area of center pin of connector. Reconnect antenna, ensuring it is fully seated into connector. If all appears to be okay, go to next step. Repair as necessary.
  14. Go to next step if only one remote transmitter is available. Test system response with another remote transmitter. If system doesn't operate with another transmitter, go to next step. If all functions work normally with another transmitter, replace defective remote transmitter.
  15. Inspect for presence of shorting plug in RKEM. If shorting plug is not installed, go to next step. Remove shorting plug if it is installed, then retest system.
  16. Unplug connector C402 from RKEM. Test for continuity between pins No. 10 (Gray/Yellow wire) and No. 15 (White/Yellow wire). If continuity does not exist, go to next step. If continuity exists, replace shorting plug.
  17. Test for continuity between program connector pin No. 1 (White/Yellow wire) and ground. If continuity does not exist, go to next step. If continuity exists, repair short to ground on White/Yellow wire.
  18. Test for voltage on pin No. 1 (White/Yellow wire) of program connector. If voltage does not exist, go to next step. If voltage exists, repair short to voltage on White/Yellow wire.
  19. Test for continuity between program connector pin No. 2 (Gray/Yellow wire) and ground. If continuity does not exist, go to next step. If continuity exists, repair short to ground on Gray/Yellow wire.
  20. Test for voltage on pin No. 2 (Gray/Yellow wire) of program connector. If voltage does not exist, go to next step. If voltage exists, repair short to voltage on Gray/Yellow wire.
  21. Measure voltage between connector C402 pin No. 15 (White/Yellow wire on mating connector) and ground. If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, temporarily substitute known good RKEM, then retest system.
  22. Measure voltage between connector C402 pin No. 10 (Gray/Yellow wire on mating connector) and ground. If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, temporarily substitute known good RKEM, then retest system.
  23. Reattach connector C402 to RKEM. Measure voltage at program connector pin No. 1 (White/Yellow wire) and ground. If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, repair open White/Yellow wire between RKEM and program connector.
  24. Measure voltage at program connector pin No. 2 (Gray/Yellow wire) and ground. If voltage is 4-6 volts, go to next step. If voltage is not 4-6 volts, repair open Gray/Yellow wire between RKEM and program connector.
  25. Turn ignition on. Insert shorting connector into program connector. If doors lock and unlock, go to next step. If doors do not lock and unlock, go to DOOR LOCKS & TRUNK RELEASE - POWER article in the ACCESSORIES/SAFETY EQUIPMENT section.
  26. Press any button on remote transmitter. It may be necessary to press button more than once. Repeat this sequence for any other remote transmitters. If both doors lock and unlock, go to next step. If both doors do not lock and unlock, go to step 13). If that step has already been performed, replace remote transmitter batteries, then repeat this step. If system still does not respond, temporarily substitute known good RKEM, then retest system.
  27. Turn ignition off. Remove shorting plug from program connector (if installed). If both doors lock and unlock, system is okay. If both doors do not lock and unlock, temporarily substitute known good RKEM, then retest system.
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