Here are a couple links to get you started. Don't be intimidated to ask anything on this forum. We have many knowledgeable folks on here willing to help. Be prepared for some snarky remarks at times, but simply ignore them. There are no stupid or innane questions. We help each other learn....Dennis
Some BasicsMore in depth but necessaryOn edit: You mentioned a trickle charger that was hooked up. Did you take a picture of that hookup? It sounds like your coach had an "issue" and the PO jury rigged it. My guess has shifted to that being your problem. Perhaps you need to change it back to how it was until you can determine why it was installed. Can you call the PO and ask? That may help you track down this demon.....Dennis