Toyota Corolla E170 (2013-2019) interior lights staying on why

Solution

1. Preparation

• Gather all necessary tools and parts.
• Disconnect the negative battery terminal to prevent any electrical shorts.

Tools Required:

• Multimeter
• Socket set
• Screwdriver set
• OBD-II scanner

2. Inspect Door Switches

• Remove the door panel using a screwdriver and socket set.
• Locate and test the door switches using a multimeter to ensure they are functioning properly.
• Replace any faulty switches.

3. Check Light Control Switch

• Locate the light control switch on the dashboard.
• Test the switch for continuity using a multimeter to ensure it is not stuck in the "on" position.
• If defective, replace the switch.

4. Verify Interior Light Timer Relay

• Locate the interior light timer relay in the fuse box.
• Remove the relay and test it for proper operation.
• If the relay is faulty, replace it with a new one.

5. Inspect Wiring Harness

• Examine the wiring harness leading to the interior lights and door switches for any signs of wear, fraying, or short circuits.
• Repair or replace any damaged wiring as necessary.