Nope, You didn't do it. Normal use, and 30 years pushed it over the edge. If you do find out it is those wire are shot, I did find some interesting tape at Menards, Google tommy tape, Menards has a generic version, I am sure I went into details, but this tape is good to protect wires upto to 500 degrees f. So I used Heatshrink, and the generic tommy tape, comes in 10ft segments, at about 4bucks. Of course I fully recommend to do the Drewpy rewire in regards to the stator. look at the others, sbondoni, drewcifer, everyone has something worth while to state. I did buy a special crimping tool, based on the general consensus. Coarse my wife knows I don't need a consensus.
My thought of the relays, in conjunction of the stator, was that it was AC current going to the relay. now that months of getting a electrical education via
www.xs400.com The diode on that white wire going to the safety relay swaps current from ac to DC.
Sooner you get a multimeter on the battery, to determine your charge capacity,at idle 12.6 or less, at 3500 rpms 13 to 14 volts, etc, and the dbl check the other things Volt reg/rec. Once you start getting some of these stats sooner we can start googling stuff. course if you find you have brittle wire coming out and under the drive sprocket. with ohms less than 1. There is actually two connectors you can check the Ohms. Left side the bike, pull the plastic cover, Right side you will find 2 plugs, and then infront of the battery box, where the stator wires makes its first connection point, then it has a jumper from there to the the back side of the battery box. If memory serves right the Recifier and maybe the voltage regulator, are there, (both of which are attached under the battery box.) should still be white to white, to white. so from here you can follow the manual for the rec test, and the other direction for the ohms for the stator test, then you can find the next connector to make sure your not dropping due to resistance at that connection point. As long as your looking at these connectors, get some very fine sandpaper, and clean em up a bit with it wrapped on to a skinny screw driver. Some where in the middle of this you might need to disconnect the battery, before your best friend sees you, and nicknames you "Sparky" Clean every connection point for the grounds. both battery wires, ground spots, ...
Oops, sorry, its late, rambling off. Gnight
Tobie