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TEST 33A - Diagnosing Key In Light Switch Problem

NOTE: For connector identification, see CONNECTOR IDENTIFICATION. For wiring diagram, see appropriate chassis wiring diagram in the WIRING DIAGRAMS Section. Perform VERIFICATION TEST 71A after each repair.
  1. Ensure ignition switch is in ON position. Open left front door. Using DRB-II, select KEY IN IGNITION SWITCH status. If DRB-II displays CIRCUIT CLOSED, go to step 5). If DRB-II does not display CIRCUIT CLOSED, go to next step.
  2. Turn ignition switch to OFF position. Disconnect key in light switch connector. Check, clean and repair connections as needed. Connect jumper wire between key in light switch connector terminal No. 3 (Light Blue wire) and terminal No. 4 (Black/Orange wire). Ensure driver's door is open. If DRB-II displays CIRCUIT CLOSED, replace key in light switch. If DRB-II does not display CIRCUIT CLOSED, go to next step.
  3. Disconnect jumper wire. Connect jumper wire between key in light switch connector terminal No 3 (Light Blue wire) and ground. If DRB-II displays CIRCUIT CLOSED, repair Black/Orange wire between key in light switch connector and ground for short to ground. If DRB-II does not display CIRCUIT CLOSED, go to next step.
  4. Disconnect jumper wire. Gain access to body controller, located behind right kick panel. With connectors connected, connect jumper wire between Black body controller connector terminal No. 2 (Light Blue wire) and ground. If DRB-II displays CIRCUIT CLOSED, repair open in Light Blue wire between Black body controller connector and key in light switch connector.
  5. If DRB-II displays CIRCUIT CLOSED in step 1), ensure left front door is open. Remove key from ignition switch. If DRB-II displays CIRCUIT OPEN, perform TEST 30A. If DRB-II does not display CIRCUIT OPEN, go to next step.
  6. Disconnect key in light switch connector. Check, clean and repair connections as needed. If DRB-II does not display CIRCUIT CLOSED, replace key in light switch. If DRB-II displays CIRCUIT CLOSED, go to next step.
  7. Disconnect body controller. Check, clean and repair connections as needed. Put DRB-II in ohmmeter mode. Measure resistance at Black body controller connector terminal No. 2 (Light Blue wire). If resistance is less than 5 ohms, repair Light Blue wire between Black body controller connector and key in light switch connector for short to ground. If resistance is more than 5 ohms, replace body controller.
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