Unfortunately, tech26 didn't post the pictures for that fuse replacement where we can see them. I reached out to him via email a while back, hoping to get those pics, no dice.
My experience with electronics fuses is that they very rarely blow for no reason:(
The RAV4 EV onboard chrger is fairly expensive when they come up for sale used (I think I saw one on eBay last week for $1500). I have it on good authority that the Model S Gen 1 onboard chrger can be substituted,
but its firmware must be re-flashed to work with the RAV4 EV, and it's hard to do that "in the wild".
Model S Gen 1 chrgers are all over eBay at $300 and up.
The Model S Gen 2 chrgers are said to be more reliable, but are apparently not backward compatible with Gen 1, and now that there's an
affordable aftermarket CAN interface that works with the Gen 2 chrgers, their used value is rising, as they can be used as an inexpensive high-quality chrger for solar banks, EV conversions, etc.