little black box behind battery in 90 Bronco???

[chuzie]

Buzz sound from the dash, from the solenoid, from the starter?

So no cranking? Nothing right? Rather a buch of clicking noise kind of like when your battery is low on voltage?

That sound is the starter relay (solenoid) opening and closing. If you have that sound but no crank I would say you have a battery issue or a starter issue and not something in between. What is your battery voltage? How about the connections both at the battery and the starter?

I would also suggest moving the crank by hand a hair in case it is in a bad spot not allowing the starter to move. Or put it in gear and move it.