The Stovebolt Site Forums The Shop Area The Electrical Bay Horn ID

Looking for the year of application for this horn. Notice it is a single pole (for the positive wire) ground is obtained by the mounting bracket.
It appears the horn button must be the positive wire and when pressed completes the circuit to blow the horn.
I know it is not a 1940-51as these horns had double poles for + & - and the horn button completed/supplied the ground when pressed. Other than the terminals, it is identical in size, shape and sound as the 1940-52 horns.
Thank you for your assistance.
Harold

In 1952 I believe they started using horn relays. For sure in 1953. I don't have access to a 52 truck diagram but the 52 car has a relay. That is when the horn trumpet started having only one hot wire and was grounded by the bracket. The button still grounds a wire at the column, but this time it was grounding the trip coil in the relay to close the main contacts which sends hot to the horn. So the horn you have, if Chevy truck, seems to be 1951 and earlier.

Edit: Dual horns were an option and I believe they had a relay. I've seen a diagram, probably from TCLederman, but can't find now.

So the horn relay on my 49 isn't original? The online parts sites like Chev's of the 40's have REPLACEMENTS listed for going back all the way to '34.

1949 Chevy Truck wiring diagram says NO unless dual horns.

I have that same horn on my 49. A fellow on this forum gave an NOS horn to me and said it was for his early 50's truck.

I can only find a listing for a 6v relay for dual matched horn (RPO/Accessory).

I'll try to remember to look at my 1954 Suburban with an original single horn?

Here is a horn discussion I was in. At the time, I must have thought I knew what I was talking about. Click.
I think Tim Lederman has a better understanding as he has one of them AD's. I don't.
52Carl was in there also, he has a better understanding than I, also. I dug out a bunch of info from the search function and other sources at the time and those fellows came with good info. Shells, Trumpets, etc. That's all I remember.

OK mine is likely original then because I have dual "snail shell" horns behind the grill. My relay sure looks original.

Nice looking wiring, dressing and routing Greg.

I can't take all the credit. I installed the $150 wiring harness from Classic Parts. You can see I didn't even remove all the "wire-by-number" stickers.

I did see that. I knew you had a kit, it was the install that I liked.

Looks like yours has 2 wire posts. Harold's only has one pole.

Thank you for all the comments. It has been a learning experience.

Does anyone have this horn in their truck? If so what year?

Thanks,
Harold