I have a friend that purchased a used 48'. I am an electronic engineer and know how to read schematics. It doesn't seem like the schematics included in the manual are a match for his boat. Most of the wire numbers do not match so it makes troubleshooting difficult. Reading here it seems that this is typical for this yacht. If some one can help to point me to where to start on some of his issues I would appreciate it. 1. The autopilot on the flybridge is blank (no power ?). Doesn't appear easy to remove as it is screwed in from the back and it has no access panel. Any know how to get to the back? If no power, where is it getting it power from? 2. The grill control is fried. I assume the breaker is in the engine room. Don't understand why the breaker would not have tripped first? Can't read the part number of the control. Does anyone have the correct part number or a suitable substitute? 3. He had a light short in on of the cabins that took out a fuse. Never had a light fail shorted! Could not believe DC fuse box is in the Master bedroom with paneling screwed in covering it! Also manual has no mention of fuse or breaker box location. Does anyone know of 24v LEDs that will fit this boat, or do I need to modify the mounting? Thank you. I am not a boat guy, (I was in aerospace power systems) and never expected to see the lack of details in an expensive yacht.