Todd,

The system Bob described uses the cranking battery as the first bank of the
3 for the 36 volt trolling motor as well. The system starts with the
cranking battery. Everything (accesssory wise) is wired to it. Then, in
addition to that, a lead is run from the positive cranking battery terminal
to the negative terminal of bank two. Another from bank two positive to
bank three negative. Then the trolling motor get 36 volts from positive on
bank three and ground on cranking battery.

Scott...

"Todd Copeland" wrote in message
ink.net...
"Bob La Londe" wrote in message
...
Most of the guys around here go with three group 31? batteries. (The
ones
bigger than the group 27s anyway.) They hook everything to the cranking
battery, and the ground for the trolling motor goes to the cranking
battery.

What purpose does connecting the ground on the deep cycle to the cranking
battery serve? Without a complete circuit I don't see the reason.