Skip the auto shop - Our mechanics make house calls

Q: I am having strange issues with my turn signals and headlights.

asked by on

I have a 1971 Plymouth Fury III. My hazards work fine, but turn signals (both sides) stopped working the other day. I also recently went over a speed bump, and the headlights went out. When I turn the brights on, the lowbeams still work fine. Very confused. I changed all the fuses out, so that’s not it. Any help would be much appreciated! Thanks, Ben.

My car has 55000 miles.
My car has an automatic transmission.

Hello. Most likely you have a bad ground some place. Grounds for the lighting system will be in several different locations throughout the car. The combination switch inside your steering column is a common culprit. What is happening is electricity has lost its normal path and is finding a new one. The results of this are unpredictable and are not an indicator of what the actual problem is.

You will need a wiring diagram and a test light to locate the source of the problem. Often with this sort of problem, a visual inspection of the wiring system will help. One of the most common reasons this occurs is after you have body work done. Grounds will not be good if they are bolted over new paint.

If you need further assistance, consider YourMechanic, as a certified technician can come to your home or office to diagnose the lights problem.

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: What does the grade assist indicator mean?

The grade assist indicator is located on your instrument panel. This light illuminates when your grade assist feature is turned on.

Q: Dashboard lights not working

Hello. There are a couple of things that come to mind. The wire that is not connected to anything could be the wire that is causing the problem. That wire could be shorting the turn signal system once it is...

Q: Headlights and fog lights won't come on

Hey there. You've covered the basics it seems. This problem may be more than just replacing a part. A technician with access to the wiring diagram for the circuit will be able to check for power and ground along certain...

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 Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
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...