I hate electrical problems.... charging

Pull your bulkhead connectors, remove corrosion with vinegar and then clean up the male terminals with emery cloth until they are shiny. Squirt the female connectors with electrical system cleaning spray and clean them out with a tiny wire brush.

Look for a hot wire in one of the circuits that has been accidentally shorted to ground at some time in the past. The wire will be stiff where it got hot. Copper turns to copper oxide when it gets hot, and copper oxide is not a good conductor. Replace the section that got overheated. I don't like to use crimp connectors. I prefer to solder all connections with rosin core solder (never acid core on electrical connections).