my Toyota Corolla E140 (2006-2013) interior lights stay on

Solution

1. Preparation

• Gather necessary tools and parts before beginning repairs.
• Tools: Screwdrivers, multimeter, OBD-II scanner, and socket set.
• Ensure the vehicle is parked on a level surface and the ignition is off.

2. Inspect Door Switches

• Sub-steps:
  • Remove the door panel using a screwdriver and socket set.
  • Locate the door switch and visually inspect it for damage or misalignment.
  • Use a multimeter to test the continuity of the switch when pressed and released.
  • If defective, replace the door switch with a new part.

3. Check Interior Light Switch

• Sub-steps:
  • Locate the interior light switch on the overhead console.
  • Ensure it is not in the "on" position; if it is, switch it back to "door" or "off."
  • If the switch is functioning improperly, replace it with a new switch.

4. Inspect Wiring and Connectors

• Sub-steps:
  • Remove any necessary panels to access the wiring harness for the interior lights.
  • Visually inspect the wiring for any frays, corrosion, or loose connections.
  • Use a multimeter to check for continuity in the wiring.
  • Repair or replace damaged wiring as necessary.

5. Test Body Control Module (BCM)

• Sub-steps:
  • Connect the OBD-II scanner and check for any BCM-related error codes.
  • Follow the manufacturer's instructions to reset the BCM if necessary.
  • If the BCM is malfunctioning, consult a professional for replacement or reprogramming.