26421 Western Fisher 4-Port Configuration Plug Headlight Common

This is 26421 configuration plug used on both Western and Fisher plows. This is for 4-port modules only. This plugs into the harness and is wired to different configurations for positive and negative common headlights. Some vehicles do not use the plug at all. This is commonly a reason for the left low beam out on certain vehicles.

Here is a link to the wiring book for 4 port wiring kits.