Cooling Fan Control Unit CDI Box For 1995-2004 Honda TRX400FW TRX450ES FE FM S

Cooling Fan Control Unit CDI Box for Honda

This cooling fan control unit CDI box manages radiator fan operation and ignition timing for 1995–2004 Honda TRX400FW, TRX450ES, FE, FM, and S ATVs.

Overview

The cooling fan control unit CDI box is the dual-purpose module that triggers your ATV’s cooling fan at the correct temperature while delivering precise spark advance. Designed specifically for 1995–2004 four-wheel-drive and sport-utility Honda models, this cooling fan control unit CDI box restores consistent engine cooling and smooth throttle response. Riders who depend on their machine for trail riding, farm work, or hunting will appreciate the plug-and-play reliability it brings back to the ignition and cooling system.

Built For Performance

• Solid-state circuitry eliminates mechanical points and premature timing drift
• Sealed, high-impact polymer housing protects against moisture, dust, and vibration
• Pre-calibrated fan trigger point matches factory temperature thresholds
• Direct-fit OEM-style connectors ensure a simple, no-splice installation
• Regulated voltage output prevents fan motor surge and ignition coil overstress
• Broad compatibility covers multiple Honda TRX400 and TRX450 variants from 1995 to 2004

Fits These Machines

• for Honda TRX400FW (1995–2004)
• for Honda TRX450ES (1995–2004)
• for Honda TRX450FE (1995–2004)
• for Honda TRX450FM (1995–2004)
• for Honda TRX450S (1995–2004)

On-The-Job Use

• Trail and mud riding with low-speed, high-load cooling demands
• Farm and ranch chores such as towing, spraying, and fence checking
• Hunting and land management where reliable ignition is critical in remote areas
• Recreational dune and woods riding

Specs At A Glance

Good To Know

Q: Does this unit control the cooling fan and the CDI ignition in one box? A: Yes, it integrates the fan relay logic and the capacitive discharge ignition circuit so both functions are restored by replacing a single failed module.

Q: Is any wiring modification required to install this cooling fan control unit CDI box? A: No modification is needed. The module uses factory-matching plugs that connect directly to the stock harness, making it a straightforward swap.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.