🔧 How to Wire Your Air Suspension System Properly: Compressors, Relays & Fuses Explained

At ONAIR, we know that performance starts with precision. Whether you're installing a full air ride system or upgrading components, proper wiring is key to safe, reliable operation. In this guide, we break down everything you need to know about wiring air suspension compressors, relays, fuses, and management systems — specifically designed for users of ONAIR air suspension kits.

🧠 Why Wiring Matters for Air Suspension

Your air suspension system is only as good as its electrical foundation. Poor wiring can cause:

• Voltage drops
• Overheating
• Blown fuses
• Compressor failure
• Inaccurate management readings

ONAIR includes a 120A 12V relay with many of our kits to simplify and protect your installation. Below is everything you need to know to wire your setup safely and efficiently.

🌀 Compressor Wiring: Best Practices

✅ Recommended Wire Gauge

Most ONAIR 480cc and 495cc compressors draw between 20–30 amps each. Undersized wire can lead to poor performance or overheating.

🛑 Always use stranded automotive-grade wire for flexibility and durability.

🔌 The 120A 12V Relay (Included with ONAIR Kits)

ONAIR includes a heavy-duty 120 amp 12V relay for controlling your compressor(s). This relay acts as a high-current switch, controlled by your management system.

🔧 Relay Pinout:

• Pin 30: Power input from battery (fused)
• Pin 87: Power output to compressor(s)
• Pin 85: Signal/trigger from ignition or pressure switch
• Pin 86: Ground

Using a relay prevents your air management system from being overloaded by compressor amperage.

🔥 Fuse Each Compressor Independently

Each compressor must be fused individually between the battery and relay.

🔋 Recommended Fuse Sizes:

• 480cc Compressor: 30A fuse
• 495cc Compressor: 35A–40A fuse

💡 Install each fuse within 12–18 inches of your battery connection.

🧠 Management System Wiring Tips

The ONAIR 4V Management System uses a handheld remote and Bluetooth app to control your suspension and monitor tank pressure.

• Use ignition-switched 12V power for the controller
• Always ground components to bare metal chassis
• Use isolated grounds for management electronics (not shared with compressors)

📋 Quick Installation Checklist

• ✅ Use proper wire gauge based on compressor draw and wire length
• ✅ Fuse each compressor individually
• ✅ Mount your relay cleanly and securely
• ✅ Ground components properly to bare metal
• ✅ Protect all wiring with loom or conduit
• ✅ Test system before finalizing install

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🚘 Ready to Ride Clean with Confidence?

At ONAIR, we make wiring simple. Every component in our kits is selected to ensure performance, protection, and long-term reliability.

Need support? Our team is always here to help. Reach out through our contact page or explore our full line of air suspension parts and accessories.

#TEAMONAIR 🏁 | shoponair.ca