Hmmmmm... Turn lights on and the CVR and ignition goes dead...
Your resistor wire may be ok.
John mentioned the yellow wire that comes from the battery side of your starter solenoid. BE CAREFUL This wire is not fused (so disconnect the battery before working on the headlight or key switches). It terminates at your headlight switch with a post and nut connection. A very short yellow jumper then feeds the ignition switch at another post and nut. I suspect this jumper is loose because multiple devices are affected on your key switch.
Your saving grace is the points! If you had an electronic ignition it would NOT work. Points and your ignition system will still function at very low voltage. The engine will get erratic before voltage becomes too low to fire plugs. - Dave