Hello All. I recently purchased a 1973 27 Ericson. It had an inboard engine that was removed, so I am putting an outboard on it in the next month or so. My problem is that none of my 12v systems work. I am pretty sure its because the ground is gone along with the motor. I am getting 12v on the back of the panel but nothing will turn on. Does anyone know which wire is the ground or does anyone have a schematic of the wiring so I can try to piece it together? I have looked online to no avail. Also related to this, can I use the motor mount bolts as a ground once I figure out which wires they are or is that not a good idea. Any tips or advice appreciated, I thought I was pretty good at 12V but the engine that everything ran through being gone is throwing me off. Thanks in advance and have a great day, glen