In this article, we simplify the 3-Pin Horn Relay wiring diagram so you can connect your vehicle and bike using the 3-pin relay.
We’ve also written a useful (and popular) guide on a 3 pole starter-solenoid diagram too, if you need to check that out too!
To better understand the 3-pin relay wiring diagram, we first look at the meaning of a relay in electrical terms.
In simple terms, a motor relay controls the electric current that circulates in the vehicle. It uses electromagnetic energy to control the flow of current in the vehicle.
Here is a simple diagram to explain the 3-pin horn relay diagram:
The 3-pin relay is a crucial part of your wiring system. It is used by the vehicle to control the power flow within the horn circuit, without which the horn cannot engage.
In addition, the pin makes use of opened and closed pins. During the activation of the coil, the current is transferred from a closed pin to the one that is opened. It is how the relay can efficiently control the movement of currents.
Furthermore, If you look closely at the diagram of the 3-pin horn relay wiring diagram, there are noticeable markings indicating the wiring process.
Pin 1 (H pin)
The first, also called the H pin, has the duty of supplying the horn with the necessary volt to power it. It is connected directly to the horn, and as power is supplied to the relay, it redirects the power to the horn for use.
Pin 2 (B pin)
B pin, the second pin seen on the diagram, is responsible for supplying power to the relay. The pin is connected to the battery, its power source. It is connected to the battery through the hot wire, which carries a high voltage.
Pin 3 (S pin)
The S pin, the third pin on the diagram, works with the horn switch. The horn switch is used to activate or deactivate the horn. The switch prevents the horn from having a short circuit.
Benefit of horn relay
A large amount of electrical current flows to the various components of the vehicle, which could damage the components. The horn relay serves as a means to reduce or eliminate the high current which flows to the horn. It provides a means to allow you to cut off electric currents from the horn when not needed with a switch.
