seems my heated seats in my 2013 mustang doesnt get hot,is there a fuse for that? but the light comes saying its on, so I think it cant be a fuse

There appears to be two fuses, note the diagram. I couldn't get everything in one picture. To get as much as I could, the diagram may be a little small. Hope you can read it. You might be able to do an ohms test for the heated seat element, if no continuity, the element would be faulty, correct. You would have to do testing on the proper wires.

Thank you.I will try this and let you know!

Hope you get it going your way.

Look under your passenger side seat. There is a module. Disconnect the main connecter on it. You'll see the problem