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System Tests

NOTE: For power door lock control module connector terminal identification, see POWER DOOR LOCK CONTROL MODULE CONNECTOR TERMINAL ID table. See Fig 1 .
NOTE: If left front power door lock switch, and power window system do not operate, check for open in Black wire between power window/door lock switch assembly and ground connection. Ground connection is located behind left side of instrument panel, above fuse block No. 2. If Black wire is okay, replace power window/door lock switch assembly.
  1. Lock all doors and tailgate. Insert door key into left front door lock cylinder and turn key clockwise to UNLOCK position. If ALL doors and tailgate unlock, go to next step. If SOME doors or tailgate do not unlock, go to step 7). If ALL doors and tailgate do not unlock, go to step 19).
  2. With key in left front door lock cylinder, turn key counterclockwise to LOCK position. If ALL doors and tailgate lock, go to next step. If SOME doors or tailgate do not lock, go to step 7). If ALL doors and tailgate do not lock, go to step 20).
  3. Ensure all doors and tailgate are unlocked. Insert key into right front door lock cylinder and turn key clockwise to LOCK position. If all doors and tailgate lock, go to next step. If all doors and tailgate do not lock, go to step 25).
  4. Ensure all doors and tailgate are unlocked. Insert key into tailgate lock cylinder and turn key clockwise to LOCK position. If all doors and tailgate lock, go to next step. If all doors and tailgate do not lock, go to step 27).
  5. Depress left front power door lock switch to LOCK position. If all doors and tailgate lock, go to next step. If all doors and tailgate do not lock, go to step 29).
  6. Depress left front power door lock switch to UNLOCK position. If all doors and tailgate unlock, power door lock system is okay. No further testing is required at this time. If all doors and tailgate do not unlock, go to step 30).
  7. If left front power door lock actuator assembly did not operate, go to step 9). If right front power door lock actuator assembly did not operate, go to step 11). If left rear power door lock actuator did not operate, go to step 13). If right rear power door lock actuator did not operate, go to step 15). If tailgate power door lock actuator did not operate, go to step 17). If left rear, right rear and tailgate power door lock actuators did not operate, go to next step.
  8. Check for open in Blue/Red wire between power door lock control module connector terminal No. 3 and suspect power door lock actuator. If okay, check for open in Blue wire between power door lock control module connector terminal No. 2 and suspect power door lock actuator. Repair wiring as necessary.
  9. Remove DOOR LOCK fuse. Disconnect power door lock control module and left front power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 3 (Blue/Red wire) and left front power door lock actuator 6-pin connector terminal No. 3 (Blue/Red wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Red wire.
  10. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 2 (Blue wire) and left front power door lock actuator 6-pin connector terminal No. 2 (Blue wire). If resistance is less than 0.5 ohm, replace left front power door lock actuator. If resistance is 0.5 ohm or more, repair open in Blue wire.
  11. Remove DOOR LOCK fuse. Disconnect power door lock control module and right front power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 3 (Blue/Red wire) and right front power door lock actuator 6-pin connector terminal No. 3 (Blue/Red wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Red wire.
  12. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 2 (Blue wire) and right front power door lock actuator 6-pin connector terminal No. 2 (Blue wire). If resistance is less than 0.5 ohm, replace right front power door lock actuator. If resistance is 0.5 ohm or more, repair open in Blue wire.
  13. Remove DOOR LOCK fuse. Disconnect power door lock control module and left rear power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 3 (Blue/Red wire) and left rear power door lock actuator connector terminal No. 1 (Blue/Red wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Red wire
  14. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 2 (Blue wire) and left rear power door lock actuator connector terminal No. 2 (Blue wire). If resistance is less than 0.5 ohm, replace left rear power door lock actuator. If resistance is 0.5 ohm or more, repair open in Blue wire.
  15. Remove DOOR LOCK fuse. Disconnect power door lock control module and right rear power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 3 (Blue/Red wire) and right rear power door lock actuator connector terminal No. 1 (Blue/Red wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Red wire.
  16. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 2 (Blue wire) and right rear power door lock actuator connector terminal No. 2 (Blue wire). If resistance is less than 0.5 ohm, replace right rear power door lock actuator. If resistance is 0.5 ohm or more, repair open in Blue wire.
  17. Remove DOOR LOCK fuse. Disconnect power door lock control module and tailgate power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 3 (Blue/Red wire) and tailgate power door lock actuator connector terminal No. 1 (Blue/Red wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Red wire.
  18. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 2 (Blue wire) and tailgate power door lock actuator connector terminal No. 2 (Blue wire). If resistance is less than 0.5 ohm, replace tailgate power door lock actuator. If resistance is 0.5 ohm or more, repair open in Blue wire.
  19. Remove DOOR LOCK fuse. Disconnect power door lock control module and left front power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 8 (Pink/Black wire) and left front power door lock actuator 3-pin connector terminal No. 1 (Pink/Black wire). If resistance is less than 0.5 ohm, go to step 21). If resistance is 0.5 ohm or more, repair open in Pink/Black wire.
  20. Remove DOOR LOCK fuse. Disconnect power door lock control module and left front power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 9 (Pink wire) and left front power door lock actuator 3-pin connector terminal No. 3 (Pink wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Pink wire.
  21. Using ohmmeter, measure resistance between left front power door lock actuator 3-pin connector terminal No. 2 (Black wire) and ground. If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Black wire.
  22. Connect power door lock control module connector. Install DOOR LOCK fuse. Using a fused jumper wire, momentarily ground left front power door lock actuator 3-pin connector terminal No. 1 (Pink/Black wire) and then terminal No. 3 (Pink wire). If all doors and tailgate do not unlock and then lock, go to next step. If all doors and tailgate unlock and then lock, replace left front power door lock actuator.
  23. Using voltmeter, measure voltage between power door lock control module connector terminal No. 7 (Red wire) and ground. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open in Red wire.
  24. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 1 (Black wire) and ground. If resistance is 0.5 ohm or less, replace power door lock control module. If resistance is more than 0.5 ohm, repair open in Black wire.
  25. Remove DOOR LOCK fuse. Disconnect power door lock control module and right front power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 9 (Pink wire) and right front power door lock actuator connector terminal No. 3 (Pink wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Pink wire.
  26. Using ohmmeter, measure resistance between right front power door lock actuator connector terminal No. 2 (Black wire) and ground. If resistance is less than 0.5 ohm, replace right front power door lock actuator. If resistance is 0.5 ohm or more, repair open in Black wire.
  27. Remove DOOR LOCK fuse. Disconnect power door lock control module and tailgate power door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 4 (Blue/Black wire) and tailgate power door lock actuator connector terminal No. 3 (Blue/Black wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Blue/Black wire.
  28. Using ohmmeter, measure resistance between tailgate power door lock actuator connector terminal No. 5 (Black wire) and ground. If resistance is less than 0.5 ohm, replace tailgate power door lock actuator. If still inoperative, replace power door lock control module. If resistance is 0.5 ohm or more, repair open in Black wire.
  29. Remove DOOR LOCK fuse. Disconnect power door lock control module and left front power window/door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 9 (Pink wire) and left front power window/door lock actuator connector terminal No. 1 (Pink wire). If resistance is less than 0.5 ohm, go to step 31). If resistance is 0.5 ohm or more, repair open in Pink wire.
  30. Remove DOOR LOCK fuse. Disconnect power door lock control module and left front power window/door lock actuator connectors. Using ohmmeter, measure resistance between power door lock control module connector terminal No. 8 (Pink/Black wire) and left front power window/door lock actuator connector terminal No. 2 (Pink/Black wire). If resistance is less than 0.5 ohm, go to next step. If resistance is 0.5 ohm or more, repair open in Pink/Black wire.
  31. Using ohmmeter, measure resistance between left front power window/door lock actuator connector terminal No. 9 (Black wire) and ground. If resistance is less than 0.5 ohm, replace left front power window/door lock actuator. If resistance is 0.5 ohm or more, repair open in Black wire.
Fig 1: Identifying Power Door Lock Control Module Connector Terminals
G96G06104Courtesy of GENERAL MOTORS CORP.
POWER DOOR LOCK CONTROL MODULE CONNECTOR TERMINAL ID

Terminal No. (Wire Color) Function
1 (BLK) Ground
2 (BLU) LOCK Output
3 (BLU/RED) UNLOCK Output
4 (BLU/BLK) Tailgate Lock Signal
5 Not Used
6 Not Used
7 (RED) DOOR LOCK (20-Amp) Fuse Power Input
8 (PNK/BLK) Unlock Signal
9 (PNK) Lock Signal
10 Not Used
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