depth finders and speakers stopped working

[melanchtonfish]

Bought a boat and took it out everything electronic and otherwise worked great except terrova trolling motor which quit after a shorter use. I hooked up the battery charger thinking that maybe the two batteries for the trolling weren't charged enough. Went to take boat out today and neither depth finder turns on and the radio works but no sound from the speakers. Everything else on the boat is powered. Did I fry the depth finders or a fuse or something? I found the fuse panel but nothing looks bad in it. Thoughts?

 

[roscoe]

Maybe a fuse, a switch, or old bad wiring.
Gonna have to disconnect and diagnose one at a time.
Everything should have its own fuse.

Trolling motor and its batteries should not be connected to any of the other wiring in the boat.

 

[melanchtonfish]

Problem resolved, battery voltage had dropped too low. Trickle charged and I'm back up and running.

 

[roscoe]

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