Horns - 6 to 12 volt
My 6v horn relay was not working and prior owner changed system to 12v. Put in a '56 Ford 12v relay and have changed the 6v horns to work in-series to accommodate the 12v change. Each horn is mounted on a vertical metal strut that comes up thru the belly pan in front of the radiator. Those struts provide each horn with separate electrical ground connections.
Horns were made by Sparton and castings are imprinted "LO" (right side) and "HI" (left side). Main body is die-cast metal and dome covers stamped-steel. The die-cast body did not rust and mild surface rust on and inside the domes cleaned-up nicely.
Substituted the metal strut under the left horn with a matching home-made polyester piece (88 cents at Walley), eliminating its elec ground connection. Then connecting that horn to the right hand horn lets them operate in series. Although the voltage thru the circuit is dropped, I notice that the loudness of the right hand horn seems comparatively less .... no big thing .... one can switch the "HI" and "LO" pitched horns if desired.
Oddly, the horn trumpet opening faces upward. I thought that was an invitation to water damage but any water that leaked in was able to drain out an opening in the bottom of the assembly leaving limited damage. The manufacturer provided a durable design and brass nuts on all parts. (here come the playful comments)
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