electrical problem - looking for the schematic for starter/alternator harness
 

Hello. Please, can someone point me to an image of the harness that wires the battery, starter and alternator together? I would like to see if there are other objects on that line that could be contributing to my problem.

Here's a long description of what's happening:

Started with a no-start. Just click. click click click. I went to address the battery and found some corrosion on the terminals. While attempting to clean them I broke one of the terminals and the battery is due anyway, so, brand new battery.

car still wouldn't start, I removed the starter motor and replaced it, that didn't help. I bench tested both starters and they both work. I took it to a mechanic.

The mechanic found that my main wiring harness had "partially blown" the fusible link requiring harness replacement from mazda. As this is a $600 part I determined the best repair would be to clip out the bad fuse and replace it. I replaced it with a 200 amp circuit breaker.

This worked for about three weeks. Today, however, while the car is running I'm finding that the fuse will partially blow, and after a minute or two it will completely blow causing the alternator to stop charging.

I am open to ideas, but I'd very much like to see that harness schematic.