need help again.

[nelsons]

I found out why the dash lights did not come on. The back of the headlight
switch had separated. Now the problem is with the headlight safety buzzer and
warning light stays on when the engine is running. As soon as I turn on the
headlights it's starts to buzz and the headlight warning comes on. It does not
make a difference whether the key is in the ignition or even while the engine is
running.
Any suggestions on how to fix this?
Thanks in Advance.
Nelson Slinkman 1994 40ft