[stagger_lee]

Same with my old truck. The combo of mud in the summer and snow in the winter caused lots of corrosion and some I couldn't see in the fibers of the cable. Whenever I had no power or reset, it was the fault of the ground not having a significant connection to complete the circuit upon start up. I was subject to constant cleaning and adjusting of cables. White vinegar works wonders. This of course would be the easiest solution, or best case scenario. Might be worth a checking before you look deeper into the electrical system.