I have the factory
Privilege 39 manual, which has some diagrams in it, but not listing specific circuits for the most part - regardless, you'll find the wiring and circuits are very different than when the
boat was delivered ~16 years ago.
Much of our DC wiring has numbered tags on the wires - I'm fairly certain this is factory, as I've found them inside every junction box I've opened, but it's possible a previous owner got bored one day and traced out every wire. I found a sheet of paper where a previous owner had chased down a bunch of circuits and figured out which breakers and switches they were on - which has helped a bunch.
On our boat, the 6th switch down on 'pumps' is the
propane sniffer/solenoid (not an original item). The original French label was "Prise 12V Inter".
Circuit #21 was traced out as "Cockpit 12V" by previous owner. I don't know if this goes to the outlet at the
helm, or the outlet next to the
salon door (or both, or for that matter, neither).
Our
lighting and fans are likewise not on the switch panel, but they are on circuits/breakers 4-14).
On the AC side, it's all going to depend on who converted the boat over from 220V to 110V - on our boat it's easy to tell, as the AC was run with all fresh wiring of a different form than the original french wiring. We've got a master breaker in the port
engine room, then at the nav station we've got 5 circuits plus a master (master, nav station, starboard, fridge, port, and water heater). The original AC breakers in the wiring cabinet are not used at all on our boat. From the factory (according to the original diagrams), there were only 2 AC plugs on the whole boat, both in the galley - however our boat had another one inside the wiring closet. From the sounds of it, your 110V retrofit may be with the original wiring.
The original 220VAC system shows a circuit-breaker in the port
engine room at the shore connection, then at the nav station it fans out into 3 circuits - water heater, charger, and plugs (both on the same circuit). It also shows a ground plate connection amidships in the port
hull. We have 4 original AC breakers (again, unused now).
I found it interesting you found a box in the AC wiring marked "Microwave". We've got the same thing, and it's puzzled me because there was never a microwave anywhere close to that box unless it was inside a closed cabinet!
When I replaced my jib sheets I made them 50' each - a bit longer than original. I can't remember exactly what size line it was - a bit smaller than what was there, but the new stuff flows better on the winches and still fits in the self-tailers fine. Haven't replaced any other running rigging yet to be able to help you out there.
There's a couple of other
Privilege 39 owners on here... I'm sure they'll jump in with what they have to add!