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Pinpoint Test B - Automatic Locking System Diagnosis

NOTE: DO NOT  run any PINPOINT TESTS unless directed by QUICK TESTS.
  1. Disconnect control module connectors. Check for continuity between pin No. 5 of connector J2 and ground (Black/White wire). Check for continuity between pins No. 1 and 15 of connector J1 and ground (Black wire). If continuity is present, go to next step. If continuity is not present at either connector, repair appropriate circuit between control module and ground. See Fig 1 .
    Fig 1: Identifying Control Module Connector Terminals
    G94F34020Courtesy of FORD MOTOR CO.
  2. Checking Driver's Seat Circuits  - Turn ignition off. Disconnect control module connector J2. With driver's seat empty, check for continuity between pin No. 14 and ground. If continuity is not present, go to step 4). If continuity is present, go to next step.
  3. Disconnect driver's seat switch. Check for short between pin No. 14 of connector J2 and ground. If short is present, repair White wire between control module and driver's seat switch. If short is not present, replace driver's seat switch.
  4. Sit in driver's seat. Check for continuity between pin No. 14 of connector J2 and ground with driver's seat occupied. If resistance is less than 100 ohms, go to step 6). If resistance is greater than 100 ohms, go to next step.
  5. Check for continuity between pin No. 14 of connector J2 and White wire at driver's seat switch with driver's seat occupied. Check for continuity between White wire at driver's seat switch and ground. If continuity is present, replace driver's seat switch. If continuity is not present, repair open in White wire between seat switch and control module or between seat switch and ground.
  6. Checking Door Lock Control Processor  - Disconnect control module connectors. Check for voltage between pins No. 5 and 1 of connector J2. Check for voltage between pins No. 14 and 25, and pins No. 1 and 15 of connector J1. If more than 10 volts are present, go to next step. If less than 10 volts are present at connector J2, repair open or short in Light Green/Yellow wire. If less than 10 volts are present at connector J1, repair open or short in Black/White wire.
  7. Open one door at a time. Disconnect module connector J1. Check for continuity between Light Green/Yellow wire circuit and pin No. 17 with door open then closed. If continuity exists with door open and does not exist with door closed, go to next step. If no continuity exists with door open, replace defective courtesy light switch. If continuity exists with door closed, repair short in door switch or circuit.
  8. Disconnect anti-theft module and control module connector J2. With all doors closed, check for continuity between pin No. 9 and ground. If continuity exists, go to next step. If no continuity exists, repair short in Black/Orange wire and/or replace door ajar switch.
  9. Disconnect anti-theft module and control module connector J2. With all doors closed, check for continuity between pin No. 9 and ground. If continuity exists with door open and does not exist with door closed, go to next step. If no continuity exists with door open and exists with door closed, repair open in Black/Orange wire and/or replace door ajar switch.
  10. Turn ignition off. Measure voltage between connector J2, pin No. 6 of module connector and ground. If reading is greater than zero, service or replace ignition switch. If reading is zero, go to next step.
  11. Turn ignition on. Measure voltage between connector J2, pin No. 6 of module connector and ground. If reading is 10 volts or greater, go to step 13). If reading is less than 10 volts, go to next step.
  12. Turn ignition off. Check for short between connector J2, pin No. 6 of module connector and ground. Check for continuity between connector J2, pin No. 6 and Purple/Orange wire of ignition switch. If continuity is present and short to ground is not, go to next step. If a short to ground or an open is present, repair Purple/Orange wire. Check ignition switch.
  13. Turn ignition on. Measure voltage between connector J2, pin No. 16 of module connector and ground. Shift transmission into "R". Measure voltage when transmission is shifted into all other positions. If reading is 10 volts or more in reverse and zero volts in all other positions, replace control module. If reading is less than 10 volts in reverse and greater than zero in all other positions, go to next step.
  14. Check operation of backup light switch. Replace backup light switch if not operational. If backup light switch operates correctly, repair open or short in Black/Pink wire.
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