Quote:
Originally Posted by mike657894
The relay will save your button. Buttons and switchs dont like amprege. 12v is harder on them. The harbour freight horn can be made to sound ok with a 6v ballast resistor. it will start to smoke if you hold the horn prolonged, I noticed that when tuning it. i had my horn hooked up no relay and it was working then I noticed my button failing sometimes. needed tapping. switched it to relay problem solved.
i used the standard off the auto parts store shelf sqaure black relay.
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Why is 12 volts harder on switches?