I have a 97 850 Base Wagon with factory heated cloth seats. The switches for the heat are located on either side of the shift lever on the center consol. You may be able to look for the wiring harness under the consol –or- where it comes out from under the carpet under each seat. Volvo has a recall notice out on the wire harness for the heated seats on my model. I do not know if that applies to your vehicle. It may be worth a check to receive the upgraded harness for your installation. Try calling a dealership service department. I live in Minnesota as well. The heated seats are great!