[C320-list] Battery Help / Confused ?

[Joe Abbagnaro]

Hi

I have a 1999 320 Hull 574, I bought the boat from the original owner.
It has 2 Batteries , NO Dedicated start battery. So I am pretty confident
the wiring is original from the factory. Both batteries are reading
about 12.4 volts but I have no way to load test them. My problem has
me confused.

1)  Select battery 1 Engine starts but no other accessories will work.
      If I turn on the map light it comes on at less than half light
than fades off after a second or so
       to no light at all. Almost looks like  a feed back condition
through the light.

2) Select Battery 2 Engine will NOTt start,  but all the Accessories
will work when powered on.

3)  Select ALL and Engine starts all Accessories work.

Do I have a bad Battery, or possibly a Bad selector switch.

Joe