I would move the bow unit to the same battery as the 998 and not connect to the trolling motor battery.
Also, Keith is right, your voltage looks low, were you trolling all day?
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trolling motor and bow unit on same battery, and the 998 is on its own battery. will try noise filter.
Yes, meant vertical lines.....thanks for the cporrection
tom
"The greatest use of life is to spend it for something that will outlast it".
William James
I would move the bow unit to the same battery as the 998 and not connect to the trolling motor battery.
Also, Keith is right, your voltage looks low, were you trolling all day?
Why do u ask about the bad battery due to the 11.7 volts. I guess I need a new one then because mine sometimes ranges from 10.9 to 11.5. Mostly 11.5 after full charge.
2003 Xpress X17
MinnKota V2 Powerdrive
Humminbird 998c
Cumberland Crappie Racks
BnM PSTs
well the TM ff is on the cranking battery (not in use all the time, just when cranking tiller motor) and the 998 is on its own marine battery
"The greatest use of life is to spend it for something that will outlast it".
William James