So I’ve been trying to tap the side marker light on the nuCamp Tab 400. Both wires are yellow. Context: I’m trying to tap the side marker light to power my rear backup camera.
I'm not an electrician but I believe 12v systems allow you to interchange either wire. So it doesn't matter which wire you use. I've done a bunch of 12v landscape wiring and positive/negative didn't apply to that. You might have a different situation than mine but have you considered tapping into the rear license plate…