I have a 1953 Chevy 1300 (Canadian 3100) on 6V. I was trying to troubleshoot some horn problems and got to figuring out that I have an Autolite HAB-60 hi and HAB-61 lo set. I'm not sure these are even 6V horns which might explain why they sound a little anemic. Can anyone definitively identify them as 6V or 12V horns? Were these the original horn on the truck? Especially interested if any Canadian 1300 owners have input!