2001 22SSV electrical problems

[quadman]

I'm having some issues with my 01 SSV. When I'm on the lake in choppy water the gage cluster starts going nuts and the motor will DIE!.....
The boat will crank back up and take off and run as long as I don't go to fast on the ruff water. I have done the following.
1. Checked ground engine block (looks good no corrosion and tight)
2. Checked battery connections( good no corrosion and tight)
3. Checked Wire harness on motor. ( seemed to be lose ???? but made sure that it was seated well.)

There are some wires under the dash that are not connected and they look like they may go somewhere.
Has anyone had issues like this ?
Dose anyone know where I could get a wire diagram for this boat?