I just experienced this issue. Mine turned out to be the seat plug that is behind the seat. I shoved a small tarp behind the seat and caused the plug to come apart. Took about a hour to figure it out too. First checked all the switches and they were working. Then started on checking power to the switches and discovered the seat plug wasn't getting power and tracked it back about 2 foot to where the seat itself gets plugged in right below the small toolbox on the back.