This got very complicated. What makes you think the battery is bad. We load checked it and it stands up very well.It is nearly new. You will also note from my post that we did check the alternator out put. Well over 13.8 measured at the house battery. That means the isolator is working. We don't have any loose connections. The only thing wrong is the charger in the converter is not working. It is not toast and would serve well if we repaired the DC charger. I am wondering how you know there are two loose connections without doing a voltage drop test. In all my years in business I tried to make mechanical judgements only after checking the problem on the vehicle, not remotely. This is an old unit and a new converter is a bad idea. But I do appreciate your expertise. Thanks...Ziffell