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.

A: Hello. Most likely you have a bad ground so...

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・Save up to 30%

Get a quote

What others are asking

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: What does the lights on indicator mean?

The lights on indicator is located on your instrument panel. This alert can illuminate for two reasons: 1. Whenever the lights are turned on. 2. Whenever the lights are turned to automatic mode, and have come on.

Q: Electrical components malfunction

Your model Mercedes uses an electronic controller called SAM (signal acquisition module) to actually supply power to many electrical components. There are multiple SAMs in your vehicle and one of these is not working properly. A professional mechanic with specific...

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 Renew Your Car Registration in Oklahoma(DELETED)
Having your car registered with the Oklahoma Tax Commission is an important part of driving legally in this state. You will need to do this within 30 days of moving to Oklahoma...
How Much Does a Mechanic Make in Vermont?
Automotive technician jobs in Vermont have an average mechanic salary of $37k, with some mechanics earning a salary of $53k.