Don't panic when the turn signal lights in your Toyota Corolla suddenly stop working. Just like the other components in your car, turn signal lights will also wear out at some point. When this happens, you should be ready to do some troubleshooting to detect the problem the earliest time possible. This way, you can immediately apply the necessary repair procedure to fix your headlights. Here are some of the common signs of turn signal lights failure and the reasons behind them:
There are several reasons why signal lights blink really fast. One of them is a damaged bulb. When any of the bulbs in the headlamp fails, the resistance switches suddenly get confused. They tend to switch the lights on and off in a very fast manner. To check the bulb's condition, you can use an ohm meter. Simply put the terminals on the bulb's electrical contact to see if it has power. Replace the bulb if it shows no power at all.
It is possible for one of the two turn signal lights to suddenly stop blinking. When this happens, check the bulbs. A broken filament is the primary cause of bulb failure. Unfortunately, it is irreparable; hence you must have it replaced. Inspect the sockets too if they are corroded. You can brush the socket with a wire brush to scrape off rust, but in most cases, corroded sockets require replacement as well.
You need to examine the flasher when the signal lights are not flashing. You must try pushing either the right or left turn signal switch. While you're doing this, try observing the light on the dash. If the lights remain lit without blinking, it means that the flasher is faulty and needs to be replaced.
If there is no Toyota Corolla turn signal light working, it is an indication of a blown fuse. You need to open the fuse box to verify this. The location and number of the turn signal light fuse in Corolla models vary, so you have to check your vehicle owner's manual. However, the fuse box is usually located under the dash of the left steering column. Install a new fuse to make the lights work again.