Fuses keep blowing

I saw your duplicate post where you listed the things on that fuse. That doesn't sound right. A properly-working heater fan motor can draw over 15 amps. Same with the radiator fan motor. If both of those are on the same fuse, you would need a fuse larger than 30 amps to have a little safety margin. When such a small fuse is listed for high-current circuits, it is usually a fuse for a computer module that controls those things through relays. When that is the case, a shorted or tight motor will blow its own larger fuse, not the smaller one for the computer. A different way to say it is if you remove the 7.5 amp fuse, it will stop those high-current circuits from working, but that's because it removed power from the computer, not from the high-current circuit.

Saturntech9 is right when he suggested replacing the fuse with a light bulb. I learned that in the late '70s at a tv servicing class put on by a manufacturer, and found it works great in cars too.