I have not yet found an accurate wiring diagram.....have ordered yet another one.....assume that perhaps the correct 66 manual should have one. Not there yet. So, with my 55 year old classic, the shankers have been active on the wiring....you have never seen such a mess including melting, fire, open wire ends and household wire connectors.....so finally realized it will need complete overhaul. So, one of my recent interesting findings relates to how to protect the car with some type of fuse. I want to bypass the ammeter, and run the alternator feed direct to battery and will use a 70 amp maxi fuse. Then, I am thinking what size fuse to use for the car wiring. So, I begin by thinking about the headlites, that is my rant of the day. I have the dual headlites on the 66 fury, meaning there are six filaments on during high beam. So, six times about 60 watts give me round about 28 amps. So, I light up the circuit with a small 16 ga shunt with clips, and light up the four beams....voila it works. But, my question here is this. How in the world am I running 28 amps thru a small 16 ga wire for a minute or so, with no great heating problems. I want to protect my circuits with something like a 50 amp fuse for the ignition meaning the whole car. But, am not understanding this. If I tried this with a 120 or 240 volt circuit with this much current, I would burn the house down. I also run an EV charging cable with set up at 24 amps, and the 10 gauge wiring gets hot during charging. I am losing what hair I have left.