Same fuse keeps blowing

[rexcramer]

As thstone has pointed out, you are developing a short somewhere. The point of the fuse is to prevent an electrical fire. If you continue upping the size of the fuse, you get to a point that is referred to as a 'smoke test'. It will be obvious where the short is. It will be where the smoke and or fire is coming from. I suggest that there is a wire that has been chaffing against something that is getting progressively worse over time. Wires are usually bundled together and you risk melting adjacent wires with a larger fuse. Thus creating additional electrical problems. Start looking at wires coming through the firewall/bulkhead.