Hope this isn't off topic...
Is there any further information regarding this Aux1 wiring issue? I have the Rigid light bar (Ford Accessories) connected to Aux1. The wire to the roof (via the RH A pillar) did in fact melt the scotchlock connector that joined the light bar to Aux1 at one point. I replaced the scotchlock but am not certain whether the issue is corrected or will melt again over time.
The wire is not rated for 30 amps. I ended up getting a 30 amp fuel pump relay and wired it to Aux 1. I ran 10 gauge wire from the battery to the relay, then ran 10 gauge from the relay to the light bar.
We had the light bar on for 1.5hrs last night in the dark and no issues.
2021 Badlands, 4 door, 2.7L, Auto, LUX, SAS, Tow Package, MIC, Velocity Blue.