Why is the rear light of the Corolla always on and cannot be turned off?
3 Answers
The rear light of the Corolla may stay on and cannot be turned off because the trunk is not properly closed. It could also be a lighting malfunction, and you can go to a 4S shop for repair. Here is some additional information: 1. Lever-type lighting: The Corolla uses lever-type lighting. Turning it to the indicated position will turn on the corresponding light, which is the most commonly used light switch in Toyota vehicles. Rotating the leftmost part will align the white line with the currently used light. The middle part can also be rotated to turn on the fog lights. 2. Conditions for turning on high beams: Turning on high beams requires the prerequisite of turning on low beams. In other lighting positions (off or parking lights), high beams cannot be turned on.
I ran into the same situation a couple of days ago with my Corolla—the rear cabin light just wouldn’t turn off, and it nearly drained the battery. I checked all four doors and the trunk one by one, and found that the right rear door wasn’t shutting properly. Turns out, the little black button on the door frame (the door contact switch) was stuck. A few pokes with a screwdriver got it to pop back out. If all doors are shut tight and the light’s still on, check if the switch at the top of the rear light has been set to ‘always on’ mode—just flip it back to auto. If that doesn’t work, it might be a wiring issue. My neighbor’s car had a short circuit from mice chewing the wires, and it cost him 200 bucks to fix at the shop. Oh, and avoid piling too much stuff in the car—it can easily press against the switches.
My old Corolla had the same issue, with the rear lights staying on all night. Focus on checking three areas: The door sensor is the most prone to failure, especially in cars over ten years old, as rubber degradation can prevent the door switch from rebounding properly. Use a flashlight to locate the small bump on the door frame and press it repeatedly several dozen times. Also, check the physical switch next to the light cover, as the toggle can get stuck in the ON position. The trunk sensor is often overlooked; slamming it shut with heavy items can knock the sensor out of alignment. For DIY repairs, you can buy a new door switch for around thirty bucks and replace it yourself. However, if you notice any exposed copper wires from damaged wiring, don’t tamper with it—seek a professional immediately.
