Good thought @lion9car, I have already checked that out as there are two wiring channels going into the lift gate. I moved the ducts all around while the brakes were on and the van inside the garage but there was no issue. At that time I was watching the resistance at the fuse position and saw no change in the 75 ohm resistance. Of course the hatch was open then so I suppose the issue could be happening while the hatch is closed and there is more tension on the wiring. I’ll see if I can pull the ducting back to inspect the wires.
I also just checked to see if the fuse would blow out with the ignition ON and moving the shift lever. The lights had no problem that way either.