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

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: My four way and left turning signals don't flash

Hello - I suspect there is a bad ground or wiring damage on the left side wiring for the turn signals. The turn signals and emergency warning flashers use the same flasher unit, which explains why the right side turn...

Q: oil drain plug

You would use a bolt-out spiral fluted socket. A common example of this tool is the Craftsman 10 pc. Damaged Bolt/Nut Remover Set Low Profile Bolt-Out (Item # 00952166000P Model # 52166). However, Irwin makes a set as well and...

Q: Engine light on. P000B Code

Hello. When this code comes up it is because the computer is not detecting that the camshaft is moving as it should when the variable valve timing system is functioning. This can be caused by a number of things. It...

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...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...