I have read the write ups for the heated seat fix, my problem seems a little different to me. When I have my drivers side heat on the passenger side seems to be on too...then if I turn the passenger side switch, the passenger side seems to come on also...thought they may of been switched but don't appear to be. Any suggestions?

 

my first suggestion would be to check the wiring behind the heated seat switches in the console. It just pops out and then you can see the back of each switch and see if a previous owner has modified it in any way

 

I will have to check that this weekend