Skip the auto shop - Our mechanics make house calls

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?

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!
  • Home
  • Questions
  • 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: Turn signal and hazard lights are not working. 2000 Chevrolet Prizm

Hi there if the fuse for the turn signals and hazard warning lights is good, the flasher unit - same integrated unit services both functions - is likely bad, and should be replaced. I would recommend a turn signal/hazard warning...

Q: Is this My Brakes or The Steering

Of course, check to be sure that you have adequate power steering fluid and that the power steering belt is on and appropriately adjusted. If the belt is missing you can request belt replacement. If the power steering fluid level...

Q: 06 2.7l dodge charger code p430

The code is telling you the computer has detected a problem with the catalytic converter. It is possible for the oxygen sensors to trip this code. You can do further testing to see if your issue is truly faulty oxygen...

Related articles

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...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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...