OK so I am getting ready to do the sea trials of the new electronics this weekend. Haven't started the boat in over a month. I turn on the engine electrical, turn the key and NUTTIN HONEY. This is the second time this has happened. The ground is new cable, the positive lead is new. The connections look tight. Tomorrow I'll start following the wiring diagram and find out where the electrons are really going with a meter. So frustrating. The batteries are showing good voltage. I'll probably start at the key and make sure power is getting that far. If it isn't then I'll work my way back thru the connections until I reach the problem. FYI - engine is a 42B Westerbeke and yes I have the wiring diagram. I'm suspicious of the 20 thermal breaker that is attached to the engine but I'll find out for sure and keep everyone appraised of what I find. I also discovered a tiny leak in my overflow tank that had emptied itself into the engine bilge. I'll have to fix that tomorrow as well.