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Why Is My Turn Signal Not Flashing On One Side?

A car’s turn signals are very important for a car. But, when it stops working turning left or right and taking a U-Turn is going to be very tricky. Fortunately, fixing a turn signal is easy. And, we get the advantage of how it either does not work at all or it does. Finding out the problem can be hard but that’s what we are for. If your turn signals are not working, this article is going to help you a lot as it will explain how to fix the turn signal by not flashing on one side and many other problems related to that.

How to know if your car’s turn signals are not working? Well, the signs are quite obvious and some common ones are mentioned in this article. The most probable one is when one of your signals works fine while the other one stops working. Another symptom could be faulty hazard lights as they are controlled by the turn signals. There is also another sign when your turn signals stop responding completely. There are other signs as well which are not that significant like the signs either blink too rapidly blink slowly.

Okay, now you know whether there is something wrong with the turn signals or not. But, what is causing it? There are many causes for this and down below are some-

Causes For Turn Signal Problems:

Well next time you blame someone for not using the indicators, there is a high chance their signals simply don’t work. The reasons mentioned below will help you troubleshoot the cause behind this.

1. Faulty Light Bulb:

If a turn signal is not working, you should check the light bulb. If the bulb has fused it cannot produce light. Check if your light bulb is the issue by using another perfectly running light bulb in its place. The fix for this is quite easy. Simply, replace it with a new one. This is the most common reason for broken turn signals.

2. Faulty Turn Signal Switch:

A signal switch is a device near the steering which tells the turn signals to blink. If the switch is faulty the bulb won’t light up. This will require more knowledge about wiring and requires a professional check. A loose wire could also be a cause behind faulty turn signals.

3. Oxidised Bulb Sockets:

Any component in your car can corrode over time. This is about proper maintenance and regular cleaning. Oxidation like rusting can minimise the contact between the turn switch and the turn signals. Excessive dirt can also build up over time causing the signals to not work.

4. Faulty Fuse:

A fuse is a safety device that breaks when too much energy or heat is passed through it. It melts off with too much energy flow. A broken fuse will break the connection between point A to point B. If this is the issue causing problems with your turn signal, you will have to replace the fuse with a new one.

5. Faulty Flasher Module:

If the turn signal is working inside the car is working and not on the outside, the flasher module could be broken. The flasher module provides power to the turn signals with the help of a strip of lead. If this piece of lead is damaged then the turn signals outside will not work properly.

How To Fix A Faulty Turn Signal?

Fixing a broken turn signal is very complex and finding the cause behind it can be very difficult. You should leave it to the care of professionals and you should not try fixing it without prior mechanical knowledge. However, if you feel you can fix it by yourself the video below might help you.

How Much Would It Cost To Fix A Faulty Turn Signal?

A turn signal which is not working will not affect the other parts of your car but it is very dangerous. It is also illegal to drive without proper turn signals. The labour cost can be anywhere from $20 to $70. The cost of the components will be from $200 to $400, depending on the extent of the issue. Most people will be ignorant about fixing this issue but it is very important to get this fixed as soon as possible.

Frequently Asked Questions:

So,here are some of the frequently asked questions about why does my left turn signal not blink , how do you fix a blinker not blinking etc?-

Why Does My Left Turn Signal Not Blink?

If there are no turn signals on either side, then you must check the fuse as it might be defective. And after that ,Another problem  which arise is turned signals on one side not working which indicate bad bulbs .

How Do You Fix A Blinker Not Blinking?

You can fix a blinker not blinking –

Verifying circuit connections that they should not be loose, corroded. Then Inspect the wiring harness for the rear section of the circuit. After thar Check for a bad connection between the turn signal switch and the flasher .

Why Is Only One Of My Blinkers Working?

When blinkers don’t work then may be due to a bad flasher relay, bad bulbs, a faulty switch,¬† between the signal switch and the flasher unit. You must check to make sure the bulbs are in working condition.

What Is The Most Common Cause Of Turn signal Problems?

The most common causes of turn signal problems-

First Check for damage in all turn signals on that side, like the ground on either light can get damaged. The next reason can be corrosion in one of the bulb sockets. Many vehicles use turn signals wired in parallel, it doesn’t take another with it.

How Do I Know If My Flasher Relay Is Bad?

There are symptoms that can alert the driver of a potential issue-
  1. You must Turn signals which do not function.
  2. Turn signals or hazards stay on.
  3. When Additional lights are not working.

Where Is Flasher Relay Located?

Flasher relay is located under the driver’s side of the dash, with the turn signal lever and hazard switch buttons. When the turn signals or hazard lights are turned on,¬† which only emit short bursts of power that cause the lights to flash.


A 2012 study by the Society of Automotive Engineers found that failure to use a turn signal accounts for more than 2 million accidents every year. Therefore, it is very important to get this fixed. A faulty turn signal not flashing on one side can be a danger to you and others. Some of the issues can be fixed by average people with prior car knowledge. A broken signal will also degrade the value of your car. I hope this article helped identify the problem.