Skip the auto shop - Our mechanics make house calls

Q: Both R&L low beam headlights quit working simultaneously.

asked by on

Both R&L low beam headlights quit working. All related fuses are OK. Replaced both low beam lamps 1.5 years ago with great results. Replaced the low beam relay and that did not work. The high beam lights work correctly. All other lights on the car work correctly. No "burnt" electrical smells. Don't know how to check to see if the replacement low beam headlamps are still good other than to remove and visually inspect the filaments? Thanks.

My car has 130000 miles.
My car has an automatic transmission.

Hi there. Check the switch to the headlights and see if there is a break in the wiring. Check the fuses and see if there is any fuse that are blown. If the fuses are good and there is no break in the wiring, then either the switch has failed or the ballast resister has failed on the low beam circuit. Turn on the switch and check for power coming out of the switch. If there is power to the switch and power out of the switch, then I recommend replacing the ballast resister. If there is no power coming out of the switch, then the switch needs replaced. If you need further assistance with diagnosing the low beams, then seek out a professional, such as one from Your Mechanic, to help you.

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

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: Not sure if I am getting the right things done to my car

Hi there. Quite often mechanics will work with their customers and most importantly; their budgets to try small and inexpensive repairs, hoping that solves the issues. In their efforts to attempt to help; they're actually making the problem worse. However,...

Q: What is a rocker switch and what uses do they have in cars?

A rocker switch is a type of on / off electrical switch that rocks back and forth on a pivot point between positions when pressed. When the switch is pressed, one side of the switch is raised, while the other...

Q: hi I have a dodge avenger 2008 with the lightning volt light on? My car does not turn on

Hi there. The lighting bolt light is a warning light that indicates a problem with the battery or charging system on our 2008 Dodge Avenger which could be caused by a damaged battery, battery cables, alternator or other electrical system...

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...
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...
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...