well i see he has opted out so im going to try to help you out, step by step what you can do to remedy your problem
there are only a few things that are shared commonly between the two seats, ground, a fuse, and a couple connections
first thing im going to need you to do is check the fuse for the heated seat, its going to be in the inside fuse panel,
that is where its located and its going to be in number 20, now what im going to want you to do, is swap out that fuse with a known good fuse even if it doesnt look blown, im going to want you to swap it out with number 31, your windsheild wipers, once you swap those out, try your heated seats, if they work, then you know the fuse was to blame, and now if your windsheild wipers dont work, you absolutely know that the fuse was blown
sometimes the fuse will blow right at the base and you cant tell unless its blown in the middle.
so if this doesnt work for you, we are going to have to go in and check some wires out and see if your getting power and ground to everything