This is a common problem with Volkswagens. The reason for the fuse box melting is a bad connection at the alternator cable terminal at the fuse box. There are several ways to attack this, but the way that seems to be most effective is to #1. Replace the fuse block #2. Replace the alternator fuse block terminal with a 4 gauge copper lug (preferably soldered on) Or if the black wire from the alternator is melted/damaged, replace it with a larger gauge wire. Also make sure and have the alternator tested. I've attached a voltage drop test. Let us know what you find.
Wednesday, September 11th, 2019 AT 2:10 PM