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Quote:
Originally Posted by drolston
Yes the horn button provides the ground, whether there is a relay, or not. The wire will be hot in either case. The relay just means a little bit of current will flow through the horn button wire when the horn button is pressed, instead of a lot of current if that wire is carrying all of the horn power.
Horn power is hot all the time, like the lights, so you can use them when the ignition switch is off.
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The term "hot" normally is used to refer to the power side of a circuit vs the ground side of a circuit. Current flows through the entire circuit to the finial ground point. It gets a little confusing on the positive ground systems because the modern mindset is positive is hot and negative is ground. Because of this I use the term "hot" to refer to the power side of the circuit.