why does my Toyota Corolla E140 (2006-2013) interior light stay on when doors are closed?

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to ensure safety.

2. Inspect Door Switches

• Tools Required: Screwdriver, multimeter
• Carefully remove the door panel to access the door switch.
• Inspect the switch for any visible damage or wear.
• If necessary, test the switch with a multimeter to check for continuity when the door is closed.
• Replace any faulty switches.

3. Check Interior Light Switch

• Tools Required: None
• Locate the interior light switch, usually on the dome light assembly.
• Cycle the switch between the "On," "Off," and "Door" positions to ensure it functions correctly.
• If the switch is faulty, replace it.

4. Inspect Wiring and Connectors

• Tools Required: Wire stripper/crimper, multimeter
• Examine the wiring harness leading to the door switches for any signs of fraying or corrosion.
• Repair any damaged wires and ensure all connectors are secure.

5. Test Body Control Module

• Tools Required: OBD-II scanner
• Connect the OBD-II scanner to the vehicle’s diagnostic port.
• Check for any error codes related to the body control module.
• If codes are present, follow the manufacturer’s procedures for diagnosis and repair.