Skip the auto shop - Our mechanics make house calls

Q: Headlights turn on by themselves

asked by on

My cars headlights are coming on even after I turn them off. Because I went to close my garage door last night and my headlights were on. I put in the key and turned on the ignition to reset the light switch and flipped the high low beam and they finally turned off when I took out my key. Could there be a relay other than the 45 – 46 relay that controls the auto headlight function? Do you know the number in the fuse box and the part number? The dash sensor is not blocked from what I can see. Do you have any other ideas?

Hello. There are only two relays for the headlight control. There may be a problem with the headlight switch malfunctioning. Check to see how long you have the auto shut off timer set to, as it could be set for longer than before. If you are still having problems with this, I would suggest that you have the headlight lighting system inspected by a certified technician, such as one from YourMechanic.

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. Headlights turn on by themselves

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 Sensors in the Air Conditioning Tell the Car if the System Is Working or Not?

Modern automotive air conditioning systems come in two basic types: Manually-controlled AC systems Auto AC systems The manual AC systems require the driver to adjust the desired amount of cooling by changing the fan speed...

Q: I replaced the bulb headlight on driver side, why it not working.

Hi there. Thanks for writing in about your 2000 Lexus ES300. Sometimes the bulb is not the reason why the headlight is not working. In fact, some common causes include a bad relay, faulty electrical harness that attaches to the...

Q: Truck developed idling problem - 1980 Ford F-100

Check the cap and rotor of the distributor. Wear and corrosion inside this component can cause many idling issues and misfires. Disconnect the coil and leave the cap off and observe the rotor spinning while having someone crank the vehicle...

Related articles

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...
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...