justin_o_guy2
Serious Thumper
Offline
What happened?
Posts: 55279
East Texas, 1/2 dallas/la.
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The switch only carries the current to actuate the relay. The small electromagnetic coil. When you push the button, the coil energizes, creating an electromagnet, pulling the heavy contacts together, and They carry the horn current. It's a smaller version of the starter solenoid, same principle. There's nothing wrong with a work bench mock up. I did one on the Taurus radiator fan I mounted up behind the seat on the backhoe. Let it run fifteen minutes and checked everything to see if anything got hot. But, in your case, all you need is to identify the actuating connections and the controlled connections. If the relay has four connections, then two of them fire the coil , closing the other two. If six, then hot and ground are controlled. You can wire it however you like. You can ground the horn anywhere and just run the hot wire through the relay. If only a hot wire comes out of the switch and goes to the horn, which grounds to the frame, then, you'll need to create a ground from the frame to go to the control end, so when you push the but on the coil will energize and then when that happens, the heavy contacts close. If you want to just run power through the relay, that's okay. Just tap into a heAvy enough wire to carry the load, run one to the horn, ground horn to frame.
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