Review on Facon Ceiling Charging Interior Motorhomes by Eric Ramen

I got one of these the other day, it wouldn't turn on at any setting, tried another 12v power supply, still nothing. Looked for another brand, couldn't find one. So ordering another one, came the same day, this one didn't work, or it was connected directly to a 12v battery, I decided to swap the wires, bam, it lights up in both modes. "I have a white wire from a lightbulb to a black one and vice versa, it worked for me. Tell me, does everyone else have to do this?