Skip the auto shop - Our mechanics make house calls

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

P0121 OBD-II Trouble Code: TPS "A" Circuit Range Performance Problem
P0121 code definition Throttle Pedal Position Sensor/Switch (TPS) A Circuit Range Performance Problem...
Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...


Related questions

Q: Turn signals and emergency flashers not working

This is most likely due to a blown fuse or because the device that flashes the lights has failed. The component that flashes the lights interrupts the electricity flow to the lights to make them flash. This "flasher" as it...

Q: Turn signal problem

The signal switch in the steering column is most likely shorted when the signals are on. You should replace the signal switch and retest the system to see if problem continues.

Q: I can't turn off my hazard lights in my Mazda 3 - help!

Hello, thank you for writing in. There is likely something wrong with the hazard switch itself. The power is always available to the switch while off or on for safety reasons. They are wired to work under any condition if...