Headlights are on a relay. It may have fused shut. The relay maybe in with the fuses. Some have a delay going off which may have failed.
They as designed to "dim" when headlights are on to reduce "glare" try adjusting dash dimmer switch
loose bulbs
check the headlight/multifunction switch
Your headlights turn off when you turn the high beams on because you have a defective switch. You need to have a mechanic replace the high beams switch. It is a simple replacement.
They stay on cause they runnin off the battery. there should be a car headlights switch somewhere by your spedometer stuff...
It could be a fuse, a relay the switch
Replace your headlamp switch.
they turn on with the windshield wiper switch
if you've tried hitting the high/low beam switch & headlights are out on both, then a bad headlight switch or headlight switch plug or high/low beam switch plug not fully engaged.
You cant
check dimmer switch for headlights
its to conserve power to start veh. with full voltage to starter headlights will come on after starting car