The Stovebolt Site Forums The Shop Area The Electrical Bay "51' Horn Wiring"

My recently purchased 51' chevy 3100, came with a box of nuts/screws, etc. and two clam shell shaped horns. I read in an earlier thread, about the horns being attached to the firewall, there are four bolts on the firewall, above and to the left of the voltage regulator, two of these bolts, match up to the holes in the horn bracket, but there does not seem to be enough room in that postion to place even one of the horns. I can't figure the wiring though! There is a horn button under the dash, two wires come off this button, run through the firewall, and attach to what looks like a horn relay. This relay has three terminals on it. There are two large (10 or 8 guage) original cloth covered wires attached to two of the terminals, these two wires come out of the original wire loom. I assume that one connects to th + side of the ammeter. and the other would have connected to the original horn button, and the third terminal would have connected to the horn? The two wires running from the horn button through the firewall are connected to the relay, with one wire being connected to one of the terminals with an already original wire on it, and the other wire from the horn button connected to the third terminal by it's self. This does not make sense to me. My shop repair manual shows no relay. just two wires running to one horn, with one wire coming from the + side of the ammeter. and the second wire running from the horn button, both ending up at the horn it's self, though I believe there is only one terminal for connection on the horn it's self. If I trace the original 2 large wires that are on this relay, will I find one connected to the ammeter, and the other dissconnected from the original horn? Thanks for any help!! :rolleyes:

Usually, when they put those "Town and Country" horns on, they'd place them on the passenger side under the hood, just above where the heater was.

Unfortunately, that's all I know about them.

I know all kinds of things about the stock "Roadrunner" horn (the one that mounts to the intake manifold), but nothing about how these other horns work.

Perhaps the dash board horn button is one of them, and the one on the steering wheel is the other?

Depending on the horn relay you have the terminals may be marked. 1 will be battery +, one will be load (horn), and the other will be ground (horn button). The horn button gounds the horn relay and the relay sends battery voltage to the horn. The relay is nothing more than an electric controlled switch. The horn switch is a manuel controlled switch. The manuel switch (horn button) tells the relay what to do.

Toyvo, Thanks! I will check the relay.

You may have already solved this but here is a wiring diagram for 1951 Chevy passenger vehicles from the Old Online Chevy Manuals maintained by Keith Hardy. Lots of free info here. Here you'll find two horns and a horn relay diagrammed. This is just a pictorial of what Toyvo was telling you. Good luck with your ride. Let us know how it is going.

http://chevy.tocmp.com/1949_53shop/12electrical/12_04.HTM

Thanks all of you!! Randy, the pictorial was a big help!