Headlights won't work

check for blown fuses or burnt fuseable link..some have a fuse for each side..

headlight switch replace.and turn signal there all together in the same switch

I think you need replace new headlights, you can browse the new blubs at www.careucar.com

Not an expert on autos but I did own a Buick Regal of that era. I had problems with mine also. They finally found that the wires to my headlight were crossed ad bare with the wires to my horn. Every time I turned on my light the horn kept blasting. Check for stripped wires near your headlights or have someone check them with a voltage meter to see if there is even power getting to the headlamps. Good luck.

grt car scanned for free at a discount place--may hav computer problem

You probably need a new swtch for headlights

COULD BE HEAD LIGHTS RELAY OR CIRCUIT BREAKER.OR BAD DIMMER SWITCH AND LOOSE OR BROKEN GROUND WIRE.

hi,
you had specified as, the headlights are not working properly & making a buzz sound.The problem is the circuit has a loose connectivity either at the switch or near the bulb. while you are able to hear the buzzing sound check the position of the wires near the source of sound. You will be able to find where the connectivity should be tightened exactly.please do this as early as possible since the loose connection can damage the circuit and the switches due to high temperature.
thanks, have a nice day.

I have a 2002 buck regal-- the lights have gone a few times also and I think it was always with the brights-- anybody else?

there is no way to bypass it but the sensor is part of the headlamp assy i would check the relay to the p lights then go from there