This particular project vehicle I'm working on is getting a set of Hella Supertones for horns. It's mainly going to be an off-roader but I still think horns are necessary for regular road use.
Anyways....I've got everything wired like this and either I stayed up too late overthinking it or something is wrong. With everything wired like pictured below, nothing happens, I can't here the relay engage, nothing happens. If I take the negative and positive leads going to the rocker switch and put the ground to vehicle ground and the positive to a hot positive post the horns go off. I tried a few other rocker switches just to make sure the momentary switch I was using wasn't faulty. I apologize for the crappy diagram and thanks for any help in advance!
1st thing: Take a meter and verify that you're on the right switch prongs to make contact when you want
2nd thing: Your schematic isn't detailed enough to know whether you're connecting the relay correctly. Relays only handle the power side of your device, you shouldn't have any grounds from the horn or switch running into it. Assuming it's a standard automotive relay, it should be connected to the horns like this:
Notice how the lights in this image have their ground going somewhere unrelated to the relay. Same thing for your horns, ground them to a bolt somewhere nearby.
12V from the battery will run into the connector #30, which will then run out of 87 to your horns. You should not be grounding the horns back to the relay in any way.
After you hook up the #85 to the ground, you should be able to jumper between 30 and 86 to trigger your horns. That jumper wire is where you want to cut and put in the switch.
WonkoTheSane said:
1st thing: Take a meter and verify that you're on the right switch prongs to make contact when you want
2nd thing: Your schematic isn't detailed enough to know whether you're connecting the relay correctly. Relays only handle the power side of your device, you shouldn't have any grounds from the horn or switch running into it. Assuming it's a standard automotive relay, it should be connected to the horns like this:
Notice how the lights in this image have their ground going somewhere unrelated to the relay. Same thing for your horns, ground them to a bolt somewhere nearby.
12V from the battery will run into the connector #30, which will then run out of 87 to your horns. You should not be grounding the horns back to the relay in any way.
After you hook up the #85 to the ground, you should be able to jumper between 30 and 86 to trigger your horns. That jumper wire is where you want to cut and put in the switch.
Thank you. I'll give this a re-attack after work.
The supertone kit came with wiring kit as well that has the relay built in as well as the in-line fuse. A positive lead with a fisheye, a negative lead with a fisheye, two sets of pos/neg going to the horns, and a set of pos/neg wires that either tie into the existing horn wiring or to a momentary switch. I apologize for not having the relay numbers up there. Maybe I'll just hack this horn wiring kit up to mimic the diagram you posted.
Edit - I also purchased one of these the other day to consolidate my lighting and accessory wiring (even though this isn't a jeep, it's getting modified) and I am going to try and tie the horn switch into this as well. https://www.amazon.com/gp/product/B07DX8PKPR/ref=ppx_yo_dt_b_asin_title_o00_s00?ie=UTF8&psc=1
