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!
  1. Home
  2. Questions
  3. I am having strange issues with my turn signals and headlights.

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 engine immediately goes to max throttle when i start it. It is a carburetor engine and i think its a vacuum leak but not sure.

This may be a sign of a vacuum leak. High idle speeds or in some cases rough idle, stalling and hissing sounds are common signs of a vacuum leak. When a vacuum leak is present in an engine, this causes...

Q: Passenger side brake light is not working - 1971 Volkswagen Super Beetle

It may just be chance that the other light quit working as well. Replace ALL of the brake light bulbs at the same time with the right bulbs and if they still do not work, suspect a problem in the...

Q: How do I turn on the room lamp?

The room lamp is located on the ceiling, and provides light for the interior of your car. To turn on the lamp, press the On/Off button on the lamp. Press this button a second time to turn the lamp off....

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...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.