Why does the turn signal stay on and cannot be turned off?

[OBrooklyn]

Check whether the horn is short-circuited or damaged. Detailed explanations for the turn signal staying on and unable to be turned off are as follows: Short circuit: There may be a short circuit in the electric vehicle's wiring. Open it up and carefully inspect the internal wires, considering whether water ingress or other issues may be the cause. Maintenance check: Repeatedly switch the electric door. If the electric vehicle has a key alarm system, start the vehicle directly with the remote without inserting the key, then observe whether the issue persists. If the alarm keeps sounding, the electric vehicle controller must be inspected at a repair shop. Regarding maintenance: Since electric vehicle projects are simpler than those of fuel vehicles, the corresponding costs are lower.

[Reyn]

I've always been quite interested in minor car malfunctions, and the issue of turn signals staying on is actually quite common. Possible causes include a stuck switch—the lever inside gets jammed and can't return to position; relay failure, which is that little box controlling the current, where the contacts fuse and the current can't be cut off; there's also a short circuit, where damaged wires directly connect; control module issues, as if the computer's brain got fried; or a blown fuse that might cause the lights to stay on randomly. I remember a friend's car had this issue due to an aging relay, with the lights staying on all night and draining the battery by the next morning, making it impossible to start. The excessive power drain can also dangerously mislead other traffic. If this happens, pull over to check the fuse and remove it as an emergency measure, then head straight to a repair shop for a full diagnosis. Never tamper with the electrical circuits yourself—it's easy to get shocked. Professional repairs are the most reliable solution.

[SavannahLee]

From the experience of frequent car repairs, the continuous illumination of turn signals that cannot be turned off mainly involves several factors. The internal contacts of the switch may be worn or stuck, preventing the circuit from being disconnected; the relay contacts may be melted and stuck, causing the current to fail to switch; the wiring may be short-circuited to the ground, especially in the wheel arches or engine compartment where aging or damaged wires directly connect; the body control module may send incorrect signals without termination; or the fuse may be blown and need replacement. It is recommended to immediately pull over safely and check the fuse box. If the fuse is blown, it indicates a short circuit and should be replaced promptly. The high power consumption of turn signals can quickly drain the battery, affecting startup. Then, take the car to a professional repair shop to test the circuit with a multimeter or read fault codes for quick repairs to avoid more significant issues.

[OArthur]

My car also had the turn signal stuck on, which was quite a scare. At the time, I pulled over, turned off the engine, and restarted it, but it didn't help. Later, the mechanic found out it was a faulty relay—the contacts inside had aged and stuck together, causing a continuous current. He said this is a common issue when relays reach the end of their lifespan or are affected by moisture. Replacing it with a new one cost a little over a hundred bucks, and the light worked fine again. I suggest you don't delay—it drains the battery quickly, so get it checked at a repair shop as soon as possible.