I'm trying to figure out if there's a short somewhere in the glow-system. Since this summer, it's been taking out the glow-fuse on occasion. I get 12,59 resting voltage (18 hours after charging) and 10,35 on the bus bar when glowing. If the bus bar voltage is lower than it should be, that would point to a short, I assume. What should the voltage on the bus bar be?