i am having a problem with my low beams they wont turn on i need to know if i have to replace the bulb or a fuse. with my high beams i need to know why my alyternator light turns on while my high beams are on.

 

Sounds like the wireing is goofed up, on the alt light showing up.
you must check the sealbeams to see if they are blown, the dim and
bright do have seperate fuses. Also could be the switch that changes from dim to bright. You didn't say what year or type, different years have different set up's

 

my bug is a 73 type 1

 

Not being on site with the car makes all this just a guess, The alt
light comming on with the high beams, could be the ground on the
speedometer head bad, that would be speedometer grounded to
the body where it mounts, and it could have a ground lug, also look
to see if the wireing has been butchered and switched around.
That model has a set of points in the turnsignal leaver that makes
contact when you lift the leaver to dim or brighten the lights, that
in tern works a relay mounted somewhere around the speedometer
behind the card board dash cover, that relay trips and does the
bright / dim thing with the lights. Back when they were new the
relay would go out a lot. the switch rarely went bad, however a
lot of years have passed and the little wires in the leaver could be
broken. All the bugs had a problem of blowing the headlights, the
voltage regulator sometimes would stick and cause a over charge
blowing both headlight at the same time, and it would be what
ever the driver had them on, bright or dim.
Hope this helps some, GOOD LUCK