In summary :
- you replaced the fuse panel and you made mistakes
- you replaced the ammeter with a voltmeter which did not work,
- you are not sure of the operation of your headlights or that of the fans
- you don't know what the ignition switch controls and which devices have a relay
- you are ready to replace your alternator without having any certainty that it is the fault
-then it will be the turn of the battery because Panteradoug had a problem with his
- you go looking for a heat protection device that resets itself without even knowing if there is one in your car
- ......
All this shows that you are not an electrician at all and have no training in troubleshooting research. It's not a criticism at all, everyone has their own skills, but in these conditions stop looking without method, in all directions at the same time, taking inspiration only from "mine did the same and it was.... .". Leave your car with a professional, PIM or another, because don't forget that a faulty electrical circuit can not only create breakdowns but also set the car on fire and in the end, if the professional is honest it will cost you less.