A buddy purchased after market heated seat covers for his Kawasaki Mule, they plug in to the port on the dash and they work great. I purchased the same product. When I plug it into the port on the dash of my 2016 Ranger it doesn't heat up. I've returned one and just got the replacement. It still doesn't heat up even though the light on the "plug" glows red. Is there any reason these would work on a Mule and not a Ranger?