Many newer cars, foreign it seems, have a dual-wire horn. One is hot, the
other ground. The ground of the horn is isolated from the horn body, so the
only way to make a single-wire horn work is to use nylon washers, one with an
extension to fit thru a hole, so the bolt won't ground, and isolate the
single-wire horn body from chassis ground, then you can ground the horn body to
the
ground wire from the harness. I've been thinking of doing the same thing to my
, er, Toyota truck, but I did find a 2-wire horn in a collection of 30+ horns
I bought at an estate auction the other week. I got some neat ones, some with
curly-ques and one with a 90-degree bend in the horn tube ( made like that ).
I'm not sure if they're 6-volt or not, but I think many of the old ones are.
I'll have to hook up my variable power supply to check them out safely.
Anyway, isolating the horn from the body is the only way to get a two-wire
system to work with a 1-wire horn. I haven't figured out the ground connection
yet , I'm sure there's a Terminal connector made to fit under a bolt with a
ground lug made on it, just haven't seen one that big a diameter for the bolt
yet. Or will have to run a wire and then a spade connector off another smaller
hole in the horn bracket. Have fun!
Jerry in Virginia
oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959
|