Oh, do I feel the love. It is painful and smells like old cheese. I would like to issue all of you a happy birthday back atcha so that I don't have to feel guilty about not blathering on about your birthdays either here or on the book of faces. Consider yourselves thanked. Please enjoy my day!
yeah, its definitely time consuming, but be patient and keep after it and you'll get it. Check your battery ground too. If its corroded, it could be draining your battery.
I'm with the others here. Check/clean every wire connection. It it probably grounded somewhere. A lot of the old bikes (hell, even some of the newer ones) had soldered wiring in the harness that over time corrodes or insulation that wears from vibrations and grounds out to the frame or other metal components. Trace every wire out and you will eventually find it. Good luck.