Q: When I use the turn signals, both tail lights blink like hazard lights.

asked by on

Hello! I need help with a tail light problem. This morning I got pulled over and given a warning about one of my brake lights not turning on when I use the brake, so I got home and fixed it doing some rewiring. It worked. Until I noticed the right side didn't work. So I fixed that as well. Now both brake lights work. Now here's the problem, I turned on the blinker to the left signal and the tail lights both flash like if the hazard light was on. What do I do?

My car has 10000 miles.
My car has an automatic transmission.

Hello. Without knowing exactly what wiring work was performed its nearly impossible to say definitively what the issue is. The brake light circuit and the turn signal circuit have crossed paths somewhere. The wires carrying the power supply from the turn signal switch is connected or touching the brake wires. The hazard light button is essentially an additional power source and switch for the turn signal circuit. With both brake lights blinking, the hazard light circuit may be crosses in as well.

Do you own a voltmeter or a way to measure available voltage? You are going to need to trace the wiring work you performed and find where the connection is jumping circuits. Having an official repair manual or wiring diagram will help a lot. Make sure once your issue is found that the wires are secured properly and protected from the elements and from other circuits.

If you’re unable to solve the issue yourself, have a certified technician, like one from YourMechanic, come to your location to diagnose the issue with your turn signals and help you make the right repair.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. When I use the turn signals, both tail lights blink like hazard lights.

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 hazard lights wont shut off. The button wires have been cut for awhile but now the hazards won't shut off and I pulled the fuse to no avail.

Hi there. It sounds like you're getting feedback through the circuits; this is when a normally off circuit gets power or ground from another circuit through an open or short. You'll need a digital volt/ohm meter, the electrical wiring diagram,...

Q: How do I use and adjust the bed extender?

If your car comes equipped with bed extenders, then there are three potential positions for the extenders. storage, divider, and extender. You can adjust the extender into either of the three settings. Storage position is the default extender position,...

Q: We changed the alternator and battery and it ran for 24 hours and now it's doing the same thing and will run for 2 mins and die

Hello, and thank you for writing in. The vehicle may be having issues with the wiring, or it may be an issue with the replacement starter. Start by checking the condition of the starter cables, the battery's ground connection, and...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...