How Does the Turn Signal Switch Know to Reset When My Car Stops Turning?

When you drive, it is not uncommon to see a motorist with a turn signal on when there is no approaching exit or turn, and obviously no intention on changing lanes or turning anytime soon. In this situation, either the turn signal cancel cam is not working or they have forgotten to turn their signal off manually. How does your car know when you finish a turn so it can turn the signal light off?

Turn signals operate in a few simple steps:

  1. Power is supplied to the turn signal lights when the signal lever is pressed. The flow of electricity to the turn signals is sent through a fused circuit and a flasher to the bulbs. The signal lever stays caught in place at this time.

  2. The turn signals continue to operate while the steering wheel is turned. Power continues to flow to the turn signals in that same manner while you make the turn. It isn’t until your turn is complete and you return your steering wheel to the center position that the signal lights turn off.

  3. The turn signals are cancelled when the steering is turned to center. As you turn the steering wheel back to the center position, a cancel cam on the steering column comes into contact with the turn signal lever inside the column housing. The cancel cam lightly presses on the signal lever and turns the signal lever off. The signal lights no longer flash.

If you are making a slight, gentle turn, or if the cancel cam is broken or worn out on your steering column, you will need to manually turn off your signal lights. A light press on the signal lever will let it spring back to the off position, turning off the signal lights.


Next Step

Schedule Oil Change

The most popular service booked by readers of this article is Oil Change. YourMechanic’s technicians bring the dealership to you by performing this job at your home or office 7-days a week between 7AM-9PM. We currently cover over 2,000 cities and have 100k+ 5-star reviews... LEARN MORE

SEE PRICING & SCHEDULING

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

Recent Oil Change reviews

Excellent Rating

(21,699)

Rating Summary
20,382
845
179
87
206
20,382
845
179
87
206

Matthew

33 years of experience
991 reviews
Matthew
33 years of experience
Volkswagen Passat - Oil Change - Hampton, Virginia
Matt always does a great job. Very professional. I look forward to my next appointment.... A++++++
Ford Expedition - Oil Change - Hampton, Virginia
I am so please to have Matt work on my vehicle, he is very friendly and personable, and always does a great job.

Greg

22 years of experience
37 reviews
Greg
22 years of experience
Audi A3 - Oil Change - Queen Creek, Arizona
Job well done! Greg was on time and professional. He treated my vehicle with care. He completed the job smoothly and so far so good. First time using Your mechanic and it was a pleasant experience. I will be looking into them again. Thanks Greg!
Ford Explorer - Oil Change - Scottsdale, Arizona
Greg was very friendly and professional. Communication was great, he let me know what he was doing. He went above and beyond to make sure everything was running smoothly. I would 100% recommend Greg!

LAVELL

27 years of experience
93 reviews
LAVELL
27 years of experience
Buick Encore - Oil Change - Oakland, California
Another home run! Really appreciate the flexibility regarding my service appointment. Due to my work schedule I desperately needed a late appointment. So grateful my car is receiving top shelf professional service. Replaced a oil pan drain plug that was seriously damaged and stripped by a competitor that will NEVER get my business again! All services were quickly completed. Thank you so much for another great experience with my.... Your Mechanic Lavell 5 ⭐️ Service consistently.

Brian

23 years of experience
483 reviews
Brian
23 years of experience
Porsche 911 - Oil Change - Ponte Vedra Beach, Florida
Brian is extremely knowledgeable and very personable and has taken very good care on my 911. I would recommend Brian to any one who has mechanical car challenges. I would recommend Brian to all My friends and family

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

Related articles

Symptoms of Bad or Failing Steering Rack Mounting Bushings
Common signs include clunking or clicking sounds, jerking movements in the steering wheel, and inconsistent steering.
Symptoms of a Bad or Failing Power Steering Pump
If you hear squealing noises, the steering wheel feels stiff, or find damage on the power steering belt, have the power steering pump replaced.
How Long Does a Center (Drag) Link Last?
The The center link has ball joints on either end, and connects the pitman arm and idler arm on your car’s suspension. This part is sometimes called the relay rod or the drag link. The main purpose of the center...

Related questions

Power steering is very hard at low speeds and in reverse.

Sounds like the power steering pump valve is failing or the pump veins are worn and causing aeration of the power steering fluid making the system not function at low engine speeds. Try putting the transmission in low and turning...

My steering wheel is locked.

Hi there. Sounds like the steering wheel lock solenoid is not working. To get to the solenoid or to remove the lock, you would need to remove the battery cables (both) and remove the horn with the airbag from the...

My front end dropped to the ground

Hello there. If something is scraping on your 2000 Ford Mustang it should not be driven until repairs have been made. Many faults will cause the front end to drop like this, the most common would be a failed ball...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1 (855) 347-2779 · hi@yourmechanic.com