Complete Guide: Wiring Dual Air Compressors for Air Systems
Installing dual air compressors is one of the best upgrades for vehicles that rely on air systems, whether for air horns, air suspension, or pneumatic tools. Using two compressors instead of one increases airflow, reduces fill times, and distributes the workload to prolong the life of each unit. While wiring two compressors may seem complex, following a structured guide ensures safe, efficient, and reliable operation.
Why Use Dual Air Compressors?
Dual compressors offer several advantages over a single compressor:
Faster Tank Fills: Two compressors can pressurize air tanks more quickly, which is essential for systems with high air demand.
Increased Reliability: Sharing the workload between compressors reduces strain on each unit, extending their lifespan.
Redundancy: If one compressor fails, the other continues to provide air, maintaining system functionality.
Better Performance: For air horns, suspension, or tools, dual compressors maintain consistent pressure even under heavy use.
Tools and Materials Needed
Before starting, make sure you have the following:
Two compatible air compressors
Relay and inline fuse kit
Wiring harness
Dash-mounted or remote switches
Electrical connectors and crimping tools
Protective wire loom or tubing
Basic hand tools (screwdrivers, wrenches, pliers)
Confirm that your compressors are compatible with your vehicle’s voltage and amperage.
Step-by-Step Wiring Process
Disconnect the Battery: Safety is critical. Always disconnect the battery to prevent short circuits or electric shocks.
Mount the Compressors: Secure both compressors on a stable, vibration-free surface with proper airflow for cooling.
Install Relay and Fuse: Use a dedicated relay to control both compressors, and install an inline fuse to protect the electrical system.
Wire Compressors in Parallel: Connect the positive terminals of both compressors to the relay output, and ground the negative terminals to a clean chassis point. This configuration ensures both compressors operate simultaneously when activated.
Connect the Switch: Route wires to your chosen switch location, either dash-mounted or remote. Test the switch to confirm both compressors turn on and off together.
Protect and Secure Wiring: Use wire loom or tubing to prevent chafing and heat damage. Double-check that all connections are secure and corrosion-resistant.
Reconnect Battery and Test: Once all connections are secure, reconnect the battery and test the system. Verify proper operation and airflow from both compressors.
Safety Tips
Use the correct gauge wire to handle the combined amperage of both compressors.
Keep wiring away from hot components like exhaust pipes.
Never bypass fuses or relays, as this could damage your system or cause fire.
Regularly inspect wiring and connections for wear and corrosion.
Final Thoughts
Proper wiring of dual air compressors ensures faster fill times, reliable performance, and longer lifespan for your air system. Following a systematic installation process and observing safety precautions is essential for efficient and safe operation. For a detailed guide, diagrams, and expert recommendations, visit DUAL AIR COMPRESSORS, which provides complete instructions for installing and wiring dual units correctly.