Honda Dual Fan Relay Kit – 10AWG Sealed Radiator Fan Wiring Upgrade (SPAL & OEM Compatible)

Honda Dual Fan Relay Kit – 10AWG Sealed Radiator Fan Wiring Upgrade (SPAL & OEM Compatible)

The VTI Honda Dual Fan Relay Kit is a professional-grade 10AWG sealed radiator fan wiring upgrade designed for high-performance Honda builds. Built to support SPAL and OEM cooling fans, this dual relay system delivers reliable high-current power for K-swaps, Civic builds, Integra setups, and trunk battery configurations. Featuring a sealed Littlefuse-style relay box, 50A input fuse, and dual 30A fan outputs, this kit is engineered for clean installation and long-term reliability.

True Dual Relay, Dual Output Fan Control

This kit uses two independent high-current relays to control each fan individually, allowing reliable operation of OEM or aftermarket dual fan setups.

A three-fuse layout is used for proper circuit protection:

• One spare 30A fuse

• Two independent 30A fused fan outputs

This ensures stable power delivery and protects both fans independently under high load.

OEM Honda Ground Trigger Integration

The system is designed to trigger using an OEM Honda fan switch / ground trigger, maintaining factory-style logic while upgrading the power delivery side of the circuit.

This makes the kit ideal for:

• Honda engine swaps

• Aftermarket ECUs using ground fan control

• Retaining OEM fan control strategies

No additional logic modules or external controllers are required.

Proper 10 AWG Power Wiring & Terminals

All high-current fan circuits are built using true 10 AWG copper wiring, terminated into 10 AWG-rated terminals where required. This eliminates common voltage drop and overheating issues found in undersized relay kits.

This kit is capable of reliably powering OEM, SPAL, or other high-performance electric fans without stressing the wiring or connectors.

Clean PDM-Style Relay Box Construction

The relay system is housed in a Littlefuse PDM-style sealed fuse and relay box, with all internal routing optimized to eliminate visible looping beneath the box.

A metal mounting bracket is included, allowing secure installation in the engine bay or chassis while maintaining a professional, OEM-plus appearance.

All wiring is either properly loomed or heat-shrunk for durability and a clean finish.

Selectable Harness Length Options

To support different vehicle layouts, this kit is available in two harness length configurations:

• 2-Foot Engine Bay Configuration – ideal for battery and fan power sourced in the engine bay

• 12-Foot Trunk Battery Configuration – designed for vehicles with relocated batteries

Both options are built to the same standards and labeled clearly for easy installation.

Fan Connector Options

This kit is available with selectable fan connector terminations to match your setup:

• OEM-style Honda fan connectors

• SPAL fan connectors

• Unterminated fan leads for custom applications

Connector selection ensures a true plug-and-play experience without cutting or splicing.

Fully Labeled, Drop-In Ready

All power inputs, outputs, and fan circuits are clearly labeled to eliminate guesswork during installation. This kit is designed to be installed quickly while maintaining professional-level wiring quality.

Compatibility

Designed for Honda platforms using dual electric radiator fans and ground-trigger fan control strategies.

Compatible with OEM ECUs, chipped OBD1 ECUs, and aftermarket engine management systems using ground fan control.

Important Notes

This kit is intended for performance and modified applications.

Proper mounting and fuse protection must be maintained.

Built in-house by VTEC Innovations using professional motorsport wiring practices.