Features:

• 12 Volt, 4 terminal, 40 amp electrical relay
• Terminal size: ¼" (6.35mm)
• Ideal for lighting, horns and many other accessories
• Wiring pinout:
• 30: 12 Volt (+) fused power in from battery or main power source
• 85: Ground (-)
• 86: 12 Volt (+) power from accessory switch
• 87: 12 Volt (+) power out to accessory