Anyone know where I can get some OEM style replacement horns at? NOS or aftermarket, I don't care, but I want to be able to wire them up correctly. I'm having that problem where any aftermarket horns I find are case-grounded so it'd be a whole mess to mount them while insulating them from the body ground.

On my car the horns are the flat round type behind/below the headlights, with a constant +12v applied and the horn switch provides the ground.

 

Any sources out there? Thnks!

I don't recall having problems installing a set of cheap Fiamm horns on my 87. Almost all vehicles (that I am fmailiar with) ground the horn circuit at the horn button, so I am surprised to hear about case grounded horns.

I saw that harbor freight has some fiamm horns, so they are 2 terminal style? I don't remember where I got the first horn I tried but the other I got at autozone and was supposed to be universal. But both horns go to ground through the mounting hardware, and had just one spade connector for the positive side which is what the horn relay/button was to control.

I've seen lots of cars like that, it's easier to only have one wire routed to the horn than two (the button usually controls ground to a relay which when activated puts positive to the horn), my F-150 did and so did my Audi and my Monte Carlo, in fact I think my subaru is the first I've seen with 2 wires, my kia might have 2, I haven't looked at it.

This might be a stupid question but does it make a difference between the 2 styles of horns? (Flat and round disc like in the subaru, and the snail-shell shaped horns like in my Ford) I guess I never thought there might be a difference in how they're hooked up. I've been talking about putting in the snail-shell style horns, they're bigger but cheaper and more common from what I can tell.

Shape Doesnt matter, almost any of them are very user friendly on the instructions too.

I just verified that the Harbor Freight Fiamms are 2 terminal (got them for my wife for xmas present... 2004. I guess I should install them soon :-\ ).

 

The Fiamms from CSK are also 2 terminal.

 

Shape determines loudness and directional properties more than anything.