I have a 2005 Acura TSX with 65000 miles (2.4LI-4). Recently the A/C, power windows, and heated seats stopped working. I checked for blown fuses, and the A/C fuse (7.5A) was blown. Put in a new fuse, and it immediately blew. I found out that this fuse is part of a circuit that includes all of the components mentioned above. There is no power going to the components as there is no illumination when the buttons for the components are operated. Is there some sort of a short somewhere?

Think of it as you would in your house when a breaker trips. You have a short and what is causing the short? How do you find it? I start checking components on the circuit to find one that shows signs of problems. I might unplug one component at a time to find the one that trips the breaker or blows the fuse.