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Test 80A - Door Ajar Lamp Circuit

NOTE: Perform TEST 78A  before proceeding with this test. For connector terminal ID, see CONNECTOR IDENTIFICATION  . For wiring schematics, see WIRING DIAGRAMS  in this article. Perform TEST VER-1 - VERIFICATION PROCEDURE  after each repair.
CAUTION: Always turn ignition off prior to disconnecting any module connector.
  1. Close all doors. Using scan tool, read left front door ajar status. If scan tool displays LF DOOR AJAR: CLOSED, go to TEST 39B  . If scan tool does not display LF DOOR AJAR: CLOSED, go to next step.
  2. Using scan tool, read door ajar status. If scan tool displays DOOR AJAR: CLOSED, go to TEST 40B  . If scan tool does not display DOOR AJAR: CLOSED, go to next step.
  3. Open left front door. Using scan tool, read left front door ajar status. If scan tool displays LF DOOR AJAR: OPEN, go to TEST 39A  . If scan tool does not display LF DOOR AJAR: OPEN, go to next step.
  4. Using scan tool, read door ajar status. While observing scan tool, open and close all doors except left front door. If scan tool door ajar status does not change each time a door is opened or closed, go to TEST 34A  . If door ajar status changes each time a door is opened or closed, go to next step.
  5. Ensure all doors are closed. If door ajar lamp does not illuminate, go to step 7). If door ajar lamp illuminates, go to next step.
  6. Disconnect Body Control Module (BCM) Gray connector. BCM is located behind right kick panel. If door ajar lamp does not illuminate, replace BCM. If door ajar lamp illuminates, repair short to ground in Pink/Black wire.
  7. Turn ignition on. Disconnect message center connector. Connector is located under left side of dash, near instrument cluster connector. Remove and inspect message center door ajar lamp. If lamp is open, replace lamp. If lamp is okay, go to next step.
  8. Using scan tool in voltmeter mode, measure voltage at terminal No. 4 (Dark Blue/White wire) on message center connector. If voltage is 10 volts or less, repair open Dark Blue/White wire. If voltage is more than 10 volts, go to next step.
  9. Turn ignition off. Disconnect BCM Gray connector. Using scan tool in voltmeter mode, measure voltage at terminal No. 1 (Pink/Black wire) on message center connector. If voltage is more than 0.1 volt, repair short to voltage in Pink/Black wire and replace BCM. If voltage is 0.1 volt or less, go to next step.
  10. Using an external ohmmeter, measure resistance between terminal No. 9 (Pink/Black wire) on BCM Gray connector and terminal No. 1 on message center connector. If resistance is 5 ohms or greater, repair open Pink/Black wire. If resistance is less than 5 ohms, go to next step.
  11. Inspect circuit board behind message center. If circuit board is damaged, replace circuit board. If circuit board is okay, replace BCM.
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