This is caused by a couple of things but basically each of them is due to high current going through this fuse. So it could be a shorted wire or a shorted component on this fuse.
However, I have seen this before and the alternator field control is shorted/damage and it basically puts too high of current out for too long and it blows this fuse so it doesn't damage the PCM.
If it were me, I would disconnect the alternator plug and then start and run the engine. It should run for a while on just the battery but clearly you are just trying to get it to run longer then it does with the alternator plugged in to confirm this is the issue. Then replace the alternator and it should take care of it.
I attached the info below for all this. Let me know what questions you have. Thanks
Images (Click to make bigger)
SPONSORED LINKS
Sunday, February 28th, 2021 AT 1:29 PM