If the capacitor is making it not work that probably means it shorted. The horn would probably work a little while without one at all.

I don't think the actual value is real critical since the intent is just to suppress arcing. I'd buy an assortment at Radio Shack and experiment if it were me.

But then my electronics training dates from the days when vacuum tubes were common, and its not been kept up to date...


1955 1st GMC Suburban | 1954 GMC 250 trailer puller project | 1954 GMC 250 Hydra-Matic | 1954 Chevy 3100 . 1947 Chevy COE | and more...
It's true. I really don't do anything but browse the Internet looking for trouble...