Rewiring
I rewired my new (to me) 1986 First 345 this fall. For those familiar with the Beneteau wiring, system is not an accurate description. This was compounded by the previous owner's lack of technical ability.What you need...A way of marking. I like numbers but a fella could use letters.Solder. IMHO this is cleaner & neater than crimps but there are technical arguments for both. If soldering, get the correct shrink wrap. Solder & shrink. I kind of twist the wires together...like a long splice and NOT an eyesplice. It makes a neat package as you slip the shrink over the solder joint. Use a Bic lighter to shrink the joint. Understand the wire colors. Typical "hot" colors are red, and sometimes blue. Groound might be black, brown, or sometimes green or green/yellow. An volt/ohm meter is a big help 'cause you can check for continuity against other known grounded wires or voltage if you unsure.Logical method. On my Beneteau there was some bizarre method of placing the ground wires exactly next to the hot wires on a terminal strip. Any loose wires... oops, dead short. Move all your ground wires to a ground bar. Easy and neat. Terminate the grounds with a ring terminal. I don't think it's real important to label the grounds 'cause ff it's a black wire, put it on the bar. Make sure that there is a large black wire coming from the battery system to the bar and it's a good idea that the ground bar is also grounded to the keel.Get some good wire. You will most likely want to eliminate some big rats nest and will come up short after trimming. The stuff they sell at West is pretinned and is VERY good. It makes for low corrosion & fast soldering.Watch out for bonehead connections. This would include most connections directly to the batteries. (It's on FIRE, now turn it off. That's hard to do if a device is directly wired to the battery.) I have excluded certain safety related items (VHF) so you don't have to understand the panel to call for help. Other bonehead connections include anything that's unfused!While you're at it. Should the nav lights be wired to the cockpit? Should the instrument lights be wired to the cockpit? If you're peeling off headliner, that's a great time to install stereo speaker wires. Should you have some way of shutting off the cockpit speakers from the cockpit (nicer than yelling over the radio during docking and anchoring!). Would it be nice to have a light to illuminate the cabin interior & companionway steps on entry?later...