Isolation Module

The first step is to consult the Electrical Schematics Guide. This resource provides a complete visual map of all wiring, which serves as your primary reference for diagnosing the system.

The 3-port system is the current industry standard, designed to provide a more streamlined and efficient operation. While 4-port configurations were used for legacy UltraMount^® compatible plows, these are being phased out in favor of the newer 3-port technology.

NOTE: Enter your vehicle specifications into Quick Match to determine the exact requirements for your specific vehicle and plow.

Yes, a 4-port module is compatible with FLEETFLEX systems. However, depending on your specific configuration, you may need an adapter kit (#29175) to ensure proper connectivity. In some instances, a new wiring harness may also be required to complete the installation.

The main difference is in their operational behavior. Visit Quick Match to determine which isolation module is required for your vehicle setup.

• The ‘Green’ Module (#29070) is the standard isolation module used for most conventional vehicle electrical systems.
• The ‘Blue’ Module (#29760) is the “Soft Start” module. It is specifically engineered for vehicles with more sensitive electrical systems to help manage power draw and prevent system overloads or diagnostic errors. This module is designed to provide a more gradual power engagement to protect the vehicle’s electronic components.

While standard isolation modules manage the connection for most setups, WESTERN^® LED lighting requires an additional Headlamp Control Module (HCM) to ensure proper performance and compatibility with your vehicle’s electrical system.

You can certainly keep running it until it finally gives out. While some long-time dealers might still be able to service legacy systems, manufacturer production of relay modules stopped in the very early 2000s, and most parts are now obsolete. If a major component fails, it is typically time to upgrade to a modern plow system.