Thanks both. Gave Autolite a call this morning to see if their technical folk could dig up any information but all they could do was search the forums. Threw the horns on 12V this morning and found the high note functions about as well as it did previously, just a little bit louder. The low note actually functions on 12V but doesn't on 6V.
In the attached picture, there appears to be a wire soldered in to bypass what looks to be a broken resistor (I think it's a resistor at least!). Anyone have an idea how I can figure out what resistance it should be? I assume whatever it is will have to handle at least 50W.
