On the side of the seats close to the front on the doors side. It is a toggle type switch. go to ebay SSr's for sale. and look at a picture of the side of the seat with the door open. you will see it. runs up and down or verticle, about 1/2" wide. :thumbs :ssr :flag :seeya
Push in at top to get high seting
middle is off
push in bottom of switch for low heat.