Q: Emergency flashers activating on their own.

asked by on November 24, 2016

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.

Electrical components are not working Inspection $79.99 - $99.99 Get a Quote

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.

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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How does the auto-reverse function work with power windows?

The power windows of your car are equipped with an auto-reverse feature. It’s designed for safety (pinch protection) – think of the doors in an elevator, or how your garage door will automatically reverse if something breaks the sensor beam....

Car shaking when started

The right motor mount bracket is known for the bolts coming loose, sometimes falling out, and causing a vibration in the engine. Check for any broken mounts or any bolts that are loose or missing. I recommend you seek a...

Oil pressure warning light flashing

Many engines, regardless of the mileage, will burn a little bit of oil over time. This is part of the reason that the manufacturers recommend changing your oil at certain intervals. If your vehicle was due for an oil...

How to stop oil burning on a 2002 Toyota Corolla

The first thing you'd want to do is change the PCV valve - the positive crankcase ventilation valve. They don't cost that much. Pray that it's that. If it is, then that means that it is sticking open, and...

Starting problems, transmission stuck on 2007 BMW 530xi

Hi. A battery light on the dashboard is the number one sign of a bad alternator. The alternator keeps the battery charged. Without a strong power source, some features on the vehicle may not function properly, which may set off...

Engine over heats no heat

If you do not have any circulation through the radiator then you may have a clogged radiator cores inside. If you used stop leak in the engine then you may have plugged up the radiator and heater core. You should...

What do you do if your shoved in a trunk and the latch is gone, and there is literally no other way out?

Well there are many different makes and models in which this would vary significantly. Most vehicles have a latch on the inside that will allow the trunk to be opened. Although older vehicles didn't have this option. If the latch...

My 1991 Chevy Silverado hesitates at times and stumbles at idle when taking off from a start

If your fuel pressure is low or you have sticking clogged injectors you may get the hesitation and stumble on acceleration but run good at cruise. Also if you have some carbon build up on the valves and throttle body...

How do I delete in coming call in my 2020carmy

Related articles

2012 Toyota Highlander vs. 2012 Dodge Durango: Which One Should I Buy?
Sport Utility Vehicles (SUVs) are a fun class of vehicle: not only are they great for carpools and moving around friends and family, but you can also get them off-road and just get dirty and have fun with them. These...
2012 Toyota Sienna vs. 2012 Dodge Grand Caravan: Which One Should I Buy?
The battle of the minivans: Toyota Sienna versus the Dodge Grand Caravan. Both of these comfy people-movers provide options galore, and the minivan is meant to get everyone where they need to go safely and quickly, at a reasonable cost...
The Best Used Cars to Buy If You Don’t Have Kids
Buying Buying a used car is rarely a simple process, but if you don’t have kids, you have many more options than those who have to account for additional passengers. There are plenty of choices out there, depending on your...