have a 1987 325 and 3 out of 4 headlights are out. high beam works but low beam wont. can anybody help please?

I'm guessing you've already tried the fuses. In the fuse box there are some relays. There is one relay for the high beams and one for the low. I don't recall which relays are which, but you might try a little swapping to see if this helps. Also, if you have a manual, the relay locations should be listed.

Good luck!