27781 Isolation Module 4 Port Western Fisher Truck Side Light Harness Green Label DRL

A new 4-Port Isolation Module (part #27781) for Western and Fisher. This is a direct replacement for #26401 (the original DRL module used on Chevy). This came in two kits # 8437-1  and #27780-1.

This module will come in a sealed bag. Please note once the bag is open the modules cannot be returned.

There are three different 4-port modules and two different 3-port modules.

These modules rarely go bad, Please be sure to check your wiring first. The newer version is a 3-port, but you would need a different light harness to use that.

On the label it says: "PN 27781/PN 27779".

Click here to use the Western Power Match to get the correct light harness.

Here is a link to the Western Wiring Schematics Guide.