Part # 26431 – ISOLATION MODULE CONV KIT

ISOLATION MODULE CONVERSION KIT

Includes the following harnesses:

• 26345 Vehicle Control Harness
• 26359 Plow Pump Harness
• 63411 Vehicle Battery Cable

Western Part # 26431 is an Isolation Module Conversion Kit, specifically designed to facilitate the upgrade of older or simpler Western Snow Plow electrical systems to a more advanced, vehicle-protective system utilizing a 3-Port Isolation Module (often referred to as a “module-style” electrical system). This kit is crucial for ensuring electrical compatibility and protecting modern vehicle electronics when connecting a snow plow.

This kit provides the necessary components to replace or convert an existing older plow-side harness to function with the 3-Port Isolation Module setup. While the exact contents can vary slightly by manufacturing revision, a 26431 kit generally includes:

• A new or updated Plow-Side Wiring Harness (often 11-pin): This is the main harness that connects directly to the plow’s lights and potentially hydraulic components. It is designed to interface specifically with the 3-Port Isolation Module.
• The 3-Port Isolation Module itself: This is the core component. It acts as an intelligent intermediary between the truck’s battery and lighting system and the plow’s electrical components. It uses internal relays and circuitry to draw power directly from the truck’s battery (or a dedicated plow battery) and then distributes it to the plow’s lights and hydraulic pump, preventing high current draws or electrical spikes from damaging the truck’s sensitive Body Control Module (BCM) or other vehicle electronics. It “isolates” the plow’s electrical system from the truck’s.
• Necessary Mounting Hardware: Fasteners, brackets, or zip ties to properly secure the new harness and the isolation module to the plow frame.
• Installation Instructions: Crucial for correct wiring and setup.

Key Benefits and Purpose:

• Vehicle Electrical System Protection: This is the primary driver for this kit. Modern trucks have complex, sensitive electrical systems. Older plow wiring could put excessive strain or introduce electrical feedback that can cause issues like flickering lights, blown fuses, or even damage to the truck’s computer. The isolation module prevents these problems.
• Improved Lighting Performance: By isolating the power, the plow’s lights often receive more consistent voltage, leading to brighter and more reliable illumination.
• Enhanced Reliability: Reduces common electrical troubleshooting issues related to plow-to-truck electrical conflicts.
• Compatibility: Allows owners of older Western plows to update their electrical system to be safely compatible with newer vehicles without purchasing an entirely new plow.

This kit is not merely an adapter; it’s a fundamental shift in how the plow’s electrical system interacts with the truck. It ensures that the plow draws power independently while still responding to the vehicle’s controls. Always refer to your specific Western Plow model’s documentation and your vehicle’s electrical specifications to confirm compatibility with Part # 26431, and follow proper electrical installation procedures, which may involve disconnecting the battery and carefully routing wires.