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Interior Light Function Inoperative

  1. Check Interior Light Circuit

    Turn ignition off. Place interior light switch in DOOR position. Using DVOM, measure voltage (backprobe) between ground and terminal No. 9 (Red/Green wire) at Smart Entrance Control Unit (SECU) harness connector. See WIRING DIAGRAMS  . If battery voltage is present, leave DVOM connected and go to next step. If battery voltage is not present, repair wiring harness between interior light and SECU.
  2. While observing DVOM, press unlock button on remote transmitter. DVOM should indicate zero volts. DVOM should indicate battery voltage with unlock button released. If voltage is as specified, recheck system. If voltage is not as specified, check for open or short in wiring harness between interior light and SECU. See WIRING DIAGRAMS  . Repair as necessary.
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