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I know you text us but easy fix.. cut the harness. Meaning after the relay, where it goes to the switch. Cut that off. Whatever went to the switch for on/off... that'll go to your upfitter. THe upfitter will turn the relay on, which will turn the lights on.
2 harnesses can be twisted together and you can use 1 upfitter to control both relays. OR you can do it via 2 switches.
2 harnesses can be twisted together and you can use 1 upfitter to control both relays. OR you can do it via 2 switches.