[wrxnofx]

Makes no sense. Where is the stock radio harness? That should provide both constant power and switched power, as well as ground. There should have been no need to tie into the headlight wiring at all. Ironically, the largest fuse in this car should be 25A. However, by default not all wires for the headlights are fused (which is why most people add in the aftermarket relays for high and low beams). Perhaps that's why they added the fuses.

I'd yank all that crap off, add the proper relays to the headlights, and find the proper radio harness behind the radio unit. Then tap into that if you really want to retain the aftermarket head unit.