☰
GET A QUOTE

Q: Headlights turn on by themselves

asked by on August 31, 2016

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?

Recommended Services

Lights (Headlamps/beams/brakes) Inspection $94.99 - $114.99 Get a Quote
Or For Any Other Auto Repairs Get a Quote

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.

GMC
headlights
Dashboards
electrical wiring
fuses
lights
Sensors
switches
electrical system
2004
Envoy XUV
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


Experienced Mechanic?

Earn up to $70/hr

What others are asking

How do I turn the clock on or off?
The clock can be turned on or off easily and quickly: 1. Press the Trip Computer switch until the settings menu shows up 2. Rotate the Trip Computer switch to Clock, then press the switch. 3. Rotate the Trip Computer...
Read more
ESC Off light came on and continued showing
This light is indicating a logged fault in the stability control system on your 2009 Kia Rondo. Common issues are generally wheel speed sensor failures (https://www.yourmechanic.com/services/wheel-speed-sensor-replacement), but this can be determined by having the faults read out of the ESC...
Read more
Tcc solenoid broke .
Your best option is to buy a service manual; it will detail the steps required to replace the TCC solenoids. Unfortunately, YourMechanic does not work on transmissions so it may be necessary to take the car to a transmission shop,...
Read more
Blower motor not working
If your heater only blows when the setting is on high, this may suggest that you have a faulty blower motor resistor (https://www.yourmechanic.com/services/heater-blower-motor-resistor-replacement). The highest speed setting may still work because in most cars in the highest fan speed settings...
Read more
On a 2008 enclave there is a p0018 code. How do you know if it's a failed sensor or timing chain?
Hi there. Locate the crankshaft position sensor and check for power to it with the key on. If there is power, then with using a paper clip to back probe the wiring with the plug installed on the sensor, check...
Read more
Temperature gauge goes up slightly then back to normal
If you are not running the a/c system at the time you see the temperature gauge go above the middle of gauge and back down every few minutes then this is normal cycling of the cooling fan. If you turn...
Read more
How many amps should my car's alternator have for a audio amplifier?
If your vehicle has a factory alternator in the vehicle, then I recommend putting in an alternator that can put out 60 amps more than the factory settings. For example, if your alternator puts out 100 amps, then you should...
Read more
Tahoe lost all engine power while driving, won't start.
Hi There, Generally, the check engine light (https://www.yourmechanic.com/services/check-engine-light-is-on-inspection) comes on when something fairly serious is going on with the vehicle. This can happen for many different reasons such as a faulty mass air flow sensor, a faulty O2 sensor, a...
Read more
All of a sudden my car is making loud noise when I turn it on, and accelerate
You need to find out if the muffler they put on is equal to the factory muffler or did they put the wrong one on and it is too noisey. It is this or there is an exhaust leak. Have...
Read more

Related articles

What Is a Reprogrammable ECU?
The The ECU, or engine control unit, is part of your car’s computerized brain and is responsible for monitoring and managing all aspects of engine operation. For anyone who isn’t interested in upgrading their car for higher performance, the stock...
Read more
How to Buy Good Quality Tail Lamp Bulbs
As As you drive along a dark and winding road in your vehicle one of the things you’re counting on is for other vehicles to be able to spot you. This is thanks to your tail lamp bulbs. Having a...
Read more
How to Set Up a Radar Detector in Your Car
A A radar detector can give you early warning when you’re about to enter an area where a police officer is using a radar gun. A radar detector can save you the expense of incurring a speeding ticket. When installing...
Read more

Browse other content

Estimates
Cities
Services
Maintenance