Turn Signals Work Sometimes? How To Diagnose & Fix

Turn Signals Work Sometimes? How To Diagnose & Fix

Turn signals are a crucial component of any car’s safety equipment. They make it possible for other road users to understand your intentions, whether you’re making a left or right turn or changing lanes. But what should you do if your turn signals are malfunctioning or only occasionally working? In this article, we’ll look at the reasons why turn signals break, how to identify the issue, and how to fix it.

Causes of Turn Signal Malfunction

Wiring issues are one of the most frequent causes of turn signal issues. The wires connecting the turn signal switch to the lights can corrode or deteriorate over time, breaking the circuit and rendering the turn signals inoperable. A broken turn signal switch is another factor that can contribute to turn signal dysfunction. The signal for the lights is sent by this switch, so if it isn’t functioning properly, the signals won’t turn on.

Damaged or loose connections are another factor that can contribute to turn signal issues. The wiring connections to the lights can corrode or become loose over time, which will stop the signals from working. Turn signal issues can also be brought on by blown fuses. If the fuses blow, the circuit won’t be protected, and the signals won’t operate. And finally, turn signal issues can be brought on by a bad flasher relay. The blinking rate of the signals is managed by the flasher relay, and if it isn’t functioning properly, the blinking rate of the signals won’t be accurate.

Diagnosing Turn Signal Problems

Examining blown fuses is the first step in diagnosing turn signal issues. This can be accomplished by inspecting the fuse box in the footwell on the driver’s side or under the hood. A fuse that has blown needs to be replaced. Examining the wiring and connections comes next. Examine the wires and connections for any indications of deterioration or corrosion. If you discover any, they will require maintenance or replacement.

Check the turn signal switch next. To do this, simply turn on the signals and watch to see if they illuminate. If they don’t, there’s a chance the switch is broken and needs to be replaced. Check the flasher relay last. You can do this by turning on the signals and paying attention to how quickly they blink. The flasher relay may need to be replaced if they are not blinking at the proper rate.

Fixing Turn Signal Problems

It’s time to fix the issue once you’ve identified it. You’ll need to replace any blown fuses you find. It will be necessary to repair or replace any damaged or corroded wiring or connections. The turn signal switch will need to be replaced if it is broken. Additionally, the flasher relay needs to be replaced if it is broken.

Prevention and Maintenance

Turn signal issues can generally be avoided. The wiring and connections can help prevent damage or corrosion that could make the signals stop working by being regularly inspected and maintained. Another way to avoid issues is to replace flasher relays or worn turn signal switches before they completely stop working. Additionally, keeping up with routine fuse inspection and replacement can help keep the signals functioning properly.


In conclusion, a number of problems can result in turn signal issues, such as wiring issues, a broken turn signal switch, faulty connections, blown fuses, and a broken flasher relay. Turn signal issues can be quickly and easily diagnosed and fixed by adhering to the procedures described in this article. And you can avoid turn signal issues altogether by performing routine inspections and maintenance on your car.