On my moms Buick, the drivers seat heater not working. I pulled the fake wood trim panel and swapped the switches, the drivers switch will make the right seat work, and the passengers side won’t make the drivers work, so I am concluding it’s not the switch. The "LO" and "HI" lights don’t come on at all, like the system is totally dead. I check any fuses I could find that seem to be for the seat heaters, including a few in the fusebox under the rear seat. Anyone come across this before??