Headlights wont come on and bright lights won't stay on hold bright light switch and blower works

HEloo ,
It indicates problem with handle, replce the combinationin switch (Headlight handle) it will solve your problem.
Thanks.

I don't believe there is a fuse. There is a circuit breaker built into the headlight switch. If you are sure the headlight switch is good, it could be a bad dimmer switch. If you have a voltmeter, with the headlight switch turned on, a larger yellow wire going from the headlight switch to the dimmer switch should be a hot wire. The dimmer switch sends power on a tan wire to the low beams, and through a light green wire to the high beam bulbs.
If your high beam indicator on the dash also doesn't work, then it is likely one of those switches. A voltmeter or test light would need to be used to find which one is bad. If you can find the connector at the steering column going to the dimmer switch, pull it apart and check for power on the yellow wire coming from the headlight switch, with the headlight switch turned on. If no power, the headlight switch is bad. If there is power there, then the dimmer switch must be bad.

Check witch solenoid is "ticking" and try a different one, and see what is happening.

Headlamp relay contacts could be stuck together causing the headlamps staying on , or the lamp control module is bad .

You didn't say what year or model your Buick is, but I would suggest replacing the relay/relays and the headlight switch.

def a BAD SWITCH....

I suggest that you have just answered you own questtion!
Regards,DT

Check at the headlight sockets for a bad ground.

check the fuses for the lights or it might be the dimmer switch check at autozone

the head light switch