Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Replace a Turn Signal / Hazard Flasher

How to Replace a Turn Signal / Hazard Flasher

car on side of the road with hazards on

Turn signals and hazard flashers are a crucial part of vehicle operation safety. Hazard lights and turn signals typically use the same bulbs and the same flasher to simplify the amount of parts on your vehicle. Your flasher controls the “blink” on both systems. It contains coils inside which opens and closes the electrical circuit to create a flashing rather the the bulbs having a constant glow. They are simple mechanical units that are usually easy to access and replace.

Part 1 of 1: Replacing a turn signal or hazard flasher

Materials Needed

  • Replacement signal flasher
  • Replacement hazard Flasher

  • Note: Some cars use one for both and some cars use separate units.

Step 1: Locate the turn signal flasher. Look to your user’s manual for information on the flasher’s location. Most manufacturers will place the flasher inside the cab of the vehicle under the dashboard. This allows us to hear the switch making connections as well (ever forget your blinker was on?).

Depending on the make of the vehicle, the flasher may be located under the hood in the main fuse box instead.

Step 2: Remove the old flasher. Once you have located the flasher, you will need to get a good grip on it. Its prongs will pull straight out.

  • Note This is the point you will want to compare your replacement flasher with your old flasher. Check for the proper number of prongs, same arrangement of prongs, and for same electrical ratings.

Step 3: Install the new flasher. Simply push the new flasher into place where you removed the old flasher. It should push in free and clear. If you have to force it in, something is wrong.

Step 4: Test the hazards and blinkers. With the vehicle in park, turn your key to accessory and test the turn signals. If they work and blink correctly, test the hazards.

Hazards and turn signals are part of the “nonverbal” communication tools critical for driver safety. Without properly functioning hazards and turn signals, not only is your vehicle not legally allowed to be on the road, but you are a great hazard to other drivers. Replacing the flasher unit can be done in a reasonable amount of time. Flashers are relatively inexpensive and easy to obtain. For help fixing issues such as these, contact a certified technicia, such as one from YourMechanic, to replace your turn signal or hazard lights for you.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...
How to Buy Fuel Treatments
Adding a fuel additive to your gas tank when you fill up is one way to clean vital engine parts of deposits, improve the performance of your engine,...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...


Related questions

Q: When Should Hazard Lights Be Used?

Hazard lights are used for emergency situations and to alert other drivers to issues such as poor road conditions or vehicle breakdown. They are suggested in situations like heavy rain or blinding snow when you have to reduce speed for...

Q: brake lights and turn signals on all the time and break lights don't work.

Hello. From what you describe, it appears that your vehicle may be experiencing electrical issues. If the brake lights are staying on at all times, then the first thing I would do is check the stoplight switch. If it is...

Q: 2003 Mercedes-Benz C230 turn signal switch problems

Then turn signal switch internal parts hold it in one direction or the other normally until the steering shaft contacts the lever mechanism and returns it to center. You have a defective turn signal switch and need to replace it....