I just pulled the trigger on 3 LP4s for my bumper. Can you wire the LPs so the backlight comes on with the headlights?I use Aux 1 for Bumper LP6 High Beam, Aux 2 for Windshield LP6 High Beam, Aux3 for Amber Backlight, Aux4 for my Rocklights. I don't see any point in using the lowbeam.
I bought the upfitter for the Bumper LP6 but then decided to make my own harness for the other set. Not that difficult to wire yourself, just have to follow the instructions and use the right gauge wire and don't power low and high beam together. In my case, I'm not using low at all.
I have to say, that the Upfitter wiring kit is some high quality goodness.
Picture below don't have the windshield LP6 mounted yet.