I have a 2005 Ford Mustang and it appears that the previous owner installed an after market device to heat the lumbar of the drivers seat but there does not seem to be a switch for it anywhere and it seems to be on constantly and can get really hot - I would like to turn if off permanently - The only switch on the seat right now is the one for the lumber support to decrease and increase and to move the seat back and forth. Last night my seat was practically scorching my lower back. Any advice on how to make the seat not heat up anymore if I don't see a switch to turn the heating on or off with?