Skip the auto shop - Our mechanics make house calls

Q: Emergency flashers activating on their own.

asked by on

Hello my car locked me out of the system I disconnected the battery and reconnected the battery had to jump start the car and now the flashers are coming on every 3 to 4 seconds
My car has an automatic transmission.

A: Hello. If your hazard lights are malfuncti...

Hello. If your hazard lights are malfunctioning, especially after a jump start, then it may be possible that there is an issue with one of the electrical components. The flashers are controlled by electrical relays that switch power to them on and off. If the electrical relays malfunction internally, they can cause the hazard lights to act up. The emergency lights are wired through the turn signal and flasher relays. These are usually located in the fuse panel found in the engine bay, in some cases one relay controls both functions. Inspecting, and testing them with a multi-meter can determine if they are working properly. If they are fine, then it may be possible that there is some sort of wiring issue that has occurred, perhaps an electrical short somewhere that is causing them to come on. Another possibility could be an issue with the turn signal or hazard switches themselves, perhaps internal faults. If you are unsure I would recommend having a professional technician, such as one from YourMechanic, come to your location to diagnose of your hazard light malfunction.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: How Does the Hazard Switch Operate?

The hazard switch, (also known as the "emergency flashers",) is a vital part of your vehicle's safety system. The switch is typically located within easy access to the driver and has a red triangle located on the switch. The main...

Q: Grinding noise when steering left in reverse at low speeds.

I am working on this

Q: Van wont strat after sitting overnight. What could be the problem?

Obviously, there is a fault in either the ignition system, the fuel system, or in the air induction system. If you are truly detecting the odor of gasoline, you might try holding the accelerator pedal firmly to the floor while...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.