Protects the horn switch from high current
Ensures strong & loud horn sound
Reduces voltage drop
Increases horn life
Most common horn relay uses 4 pins:
| Pin No | Function | Description |
|---|---|---|
| 30 | Power Input | Battery +ve |
| 85 | Coil (-) | Ground or horn switch |
| 86 | Coil (+) | Horn switch or ignition |
| 87 | Output | To horn +ve |
📌 When the horn button is pressed, pins 30 & 87 connect.
| Pin | Function |
|---|---|
| 30 | Battery Input |
| 85 | Coil (-) |
| 86 | Coil (+) |
| 87 | Normally Open (NO) |
| 87a | Normally Closed (NC) |
Voltage: 12V DC
Current: 30A / 40A
Contact Type: SPST / SPDT
Material: Copper / Silver alloy contacts
Battery + ➜ Pin 30
Horn ➜ Pin 87
Horn switch ➜ Pin 86
Ground ➜ Pin 85
Car horn
Bike horn
Dual horn setup
Air horn system
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