What does auto on lights mean?
Automatic Light Control turns the lights on whenever the sensor, in the instrument panel, senses dark conditions. The system will activate the lights when the car is driven in a enclosure, such as a parking garage. Heavy overcast conditions can cause the lights to switch on.
Why do headlights turn on when the car is off?
Your lights must have been modified in order for this trouble to occur. Normally the light switch supplies a ground connection for the lights and the ignition switch supplies power to the relays which are also controlled by the light switch. Check to see if power is getting to the low beam lights even though they are off.
Why does my car light come on at night?
It may be for the headlights or the DRL also known as daytime running lights. You may be able to swap it with a similar relay that serves another function. Use a relay that is not safety related such as power windows rather than Antilock brakes.
Why are the headlights coming on in the middle of the night?
Check the owners manual page for fuses and relays diagram. It is possible that you have a bad headlight relay (if Jettas have them). It may be for the headlights or the DRL also known as daytime running lights. You may be able to swap it with a similar relay that serves another function.
Why are my dash lights on during the day?
Other cars have daytime running lights, which is essentially just a system that automatically turns the headlights on—but doesn’t affect the dash lights—during the day. If that system fails, it may cause the headlights to remain on.
Your lights must have been modified in order for this trouble to occur. Normally the light switch supplies a ground connection for the lights and the ignition switch supplies power to the relays which are also controlled by the light switch. Check to see if power is getting to the low beam lights even though they are off.
It may be for the headlights or the DRL also known as daytime running lights. You may be able to swap it with a similar relay that serves another function. Use a relay that is not safety related such as power windows rather than Antilock brakes.
What to do if your headlights Don’t Come On?
Leave the vehicle overnight to see if the lights come on. If not – progress! Re-install the DRL and headlight relays one at a time – install, leave overnight, check to see if the lights come on.
Check the owners manual page for fuses and relays diagram. It is possible that you have a bad headlight relay (if Jettas have them). It may be for the headlights or the DRL also known as daytime running lights. You may be able to swap it with a similar relay that serves another function.