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In each case when I press the horn button there is a click and nothing else.
I'm with Rodekyll, you meed a 4 pin relay.With a 4 pin relay you can run a 15 Amp circuit from the battery to the relay contact a wire from the other relay contact to the horns and a ground from horn to chassis (unless one terminal is already grounded)The relay coil can then be fed from any handy switched circuit via a wimpy wire with another wimpy wire to the horn button.Don't skimp on the horn wire, #14 at least. The coil wires can be any small wire.It can be done with 3 terminal relay but then you need to feed the relay contact with a switched circuit from the ignition switch which or the horn will be always alive. The horn will not be as loud fed from the switch.BTW the pair of Fiaam El Grande horns from Canadian Tire come with a relay.ttp://www.canadiantire.ca/en/pdp/el-grande-twin-red-electric-horns-0202005p.html#srp
Thanks Roy!Can I use the original switch that is a ground to frame?The click I hear is coming from the relay, with each of the three relays the same click, I opened up a FIAM relay and when I pressed the horn button the points contact closed but that is all that happens. Horns work just fine with jumpers to the battery.
Yes, one end of the coil will be connected to a switched circuit, the other end will go to the horn button, when you press the button the coil will have 12 Volts across it.The reason for feeding the coil with a switched circuit is so when the key is Off the horn won't work.
A relay is an electrically operated switch. Two of the connections on the relay are for the switch control, the other two deliver the power to the device being energized (horns in this case). They normally have a diagram on the side of the case letting you know what each terminal does. I've never used a three terminal relay, so if the other guys say they don't work, I'll have to take their word for it. But I can't imagine they'd still be sold if they don't. With yours, you've got two possible reasons it's not working: 1. the relay isn't being activated by your switch, or 2. the relay isn't transferring the power to the horn. Like I said before - if you ground out the relay at the S terminal and the horn works, you'll know it's the horn switch on the bars. That's an easy enough test to do. Scenario #2 - replace the relay. Or you can install a 20amp four pin relay. You will need to mock up a +12V lead to the relay for one of the two horn switch terminals. Your horn button will work just fine - as long as it makes a connection to ground when pushed.