Originally Posted by welshwind
When I tried to start on Battery 1 this weekend, nothing. Tried numerous time and nothing. The oil pressure alarm was bright and clear, but not a budge out of the starter. When I added Battery 2 to the mix, it fired right off.
Sounds like a bad connection in the Battery 1 circuit. Try cleaning the battery terminals. If that doesn't fix things, try cleaning other connections like at the battery switch.