Yes yes we know... With enough time and patience one can fix almost any problem. The reality, however, is that the time you spend scratching your head, poking around at unknown wires and sucking down beers is a waste; considering you could be riding, that is. If you just tucked your pride a little bit and bought a damn manual for that vintage bike! Just saying... It's okay...no one will make fun of you. The best of us use manuals, trust us- it's worth the savings in time and frustration. Just look at all the good results from the Kamasutra, eh?