It had been sitting for a couple days with the fridge on, so the battery wasn't at full charge. But you might be right; the battery is almost 4 years old now, and maybe it's lost some of it's ability. I'll be running it this week and then up to Paonia for the weekend, so I'll have a chance to see if the wiring and plugs make a difference.
1976 FJ40 - green and mostly stock
1996 FZJ80 - not so stock