I just bought a 2002 ford f150 supercrew lariat and was wondering if someone could help me try and figure out what is wrong with the drivers side heated seat. I checked the fuse for the heated seats and didn't figure it would be bad because the passenger side works fine and it wasn't. I checked underneath the seat briefly for unplugged wires and didn't find anything. The Light on the heated seat button lights up when you press it but no heat. Please help. Thanks.

 

Mine did that when I bought mine used. It was still under warranty though. It was the heating element that went bad. Dealer had to remove the whole seat and the cover to replace it.

I'd say check those plugs. See if you have any voltage to that point. That should answer it.