[Big Mike]

I just installed my fisher 3 port, 3plug isolation module on my 2017 Silverado. It was on my 2008 gmc sierra . I have led lights on the 2017 silverado, so I did change the lighting harness for the hid/ led harness kit. My problem is when I plug in the 11 pin plug, I have parking lights, but no headlights on the plow. Could it be because the plow lights are halogen?

 

[cwren2472]

Try turning the lights off manually, turn the truck off, plug the plow in, then turn the truck and lights back on

If the plow lights come on, it means you need the soft start relay module