Nothing earth shaking, but checking connections is one thing, finding an actual voltage at the connection point is another. Just checking/tightening connections may accidentally fix something, but you are shooting in the dark. By measuring voltages you will find out if the connections up stream toward the battery are actually working. (Note you can tighten a connection and it may still not work given corrosion of a break in the wire etc.)Any suggestion on how I should troubleshoot the system.