Use a battery charger or battery and put the ground connection on the bracket or base of the horn, then touch the positive connection to the input wire or spade on the horn and it should sound

I don't know much about 6 volt but Ive heard that 12 volts will only make the horn louder ??? But Im not sure

good luck
Todd

Some people are like Slinkies, Their not really good for nothing... But they still bring a smile to your face when you push them down the stairs.

1951 3100 350 TBI Gallery Toddzilla... "$old"