Resolved - Seat heater issue

Found the problem. It was the ground after all. After crawling under and removing a bunch of zip ties, it was using a V- instead of a ground. Which is why it would only work when the lights were on. Removed that and put it on a bolt and it works like it should now.

1 broken switch and a broken clip later. Thanks for all the helps guys.

 

Nice work!

 

Now lets see if my OCD kicks in to figure out how to dim those switches, ha.

 

Just for closure, I did figure out how to dim the switches. This set of heaters and switches uses 2 grounds. 1 for the heater and another for the switch dimming. They are tied together though. I had to split them up and use the regular black for the main ground - metal bolt and then the other black wire with a white stripe got moved to a V- for dimming. Everything works perfectly now.