Engine won't start in battery position 1

[Bkrobz]

I have an 07 22ssv with the dual battery setup.

Last year I would leave it in position one all the time and never had problems starting. It would start in 1, 2, and 1+2. This year, it will only start in 2, and 1+2. It doesn't start in position 1.

I've verified both batteries are charged and I swapped positions and either battery will start the engine when it is hooked up as battery 2.

On battery 1 position, the amp kicks on, all the other electronics work, it just doesn't start. Since the owners manual recommends leaving the switch in position 1 since it supposedly charges the accessory battery after the 1st is charged, I would rather leave it in 1 and not have to switch batteries if battery 2 ever ran out.

Any ideas? I've called the dealership and they told me to stop by but I'm an hour away and would prefer not.

Thanks for any help.

[pwildbil]

If it wont start in just position 1 and You are 100% SURE the battery is good then it would have to be a connection/switch issue. Just have to find where it is(easier said than done some times). I would start at the battery and work from there. Hope this helps!!