Re: These wires go .....?
ok, each accessory should have a (+) wire leading from the fuse panel to the switch, then from the switch to the device, then a ground wire from the device to a negative terminal strip or bus bar. You have a problem that affects all the accessories, so you've most likely lost power from the battery to the fuse panel. The fuse panel doesn't need a ground wire....although I guess it might have a negative terminal strip on the same panel (unlikely).
Is it possible that those wires weren't connected, and that the loss of accessory power is just coincidental? Is there a fishfinder bracket on your console that doesn't have a fishfinder in it? Lot of times fishfinders are wired separately from other accessories to avoid electrical noise.
Can you trace the 12V wire from the fuse panel back to the battery - it might (should) have an inline "master" fuse or circuit breaker near the battery (probably within 6 or 7" of the positive battery post).
If there's corrosion on any of the connectors, you may have to clean 'em before you can find your problem.
you can find switches, panels, fuses, wiring, at basspro, west marine, academy sports, etc. And there's quite a bit of that stuff on ebay. Marine grade wiring is kind of pricy - I used automotive, works fine so far. Rewiring your boat.........there's lots worse ways to spend a couple afternoons.........if you can find a shady place to park.
