Here's one for the electrical gurus out there: I had my project bike semi-running last week, but there was an issue with the carbs. If I held open the throttle, the bike ran ok; if I didn't, nada because the idle adjust wouldn't screw in far enough to get 'er started. Pulled the carbs, fixed the knob, have the bike back together and am ready to roll. EXCEPT: When I push the starter button, the solenoid clicks and the instrument panel lights (and everything else) go out. Wait a few minutes, turn the key, lights are back on, hit the starter button, click and lights out. I had this happen during my Orleans rebuild and it turned out to be a couple of crossed wires. But nothing seems out of place at this point. Here's what I've done for troubleshooting:
Checked the engine and battery grounds (both ok); replaced the RH controls in case it was a wiring issue in the control unit - same result; checked my fuses -lights out would suggest a blown fuse. Nope - all fuses are good (this was exactly how it happened with O, too); checked the ignition wires- they are visually fine. Unplugged the unit and the white and brown/wh and reinserted, same result. Battery has plenty of voltage, at least for the lights to come on. Can anyone think of anything I overlooked? Again, it was running last week and the only thing I did was to pull the carbs.
UPDATE: I couldn't leave well enough alone, so went back out to fiddle around some more. Got the lights to come back on, but when I pressed the starter button, same ol'. Tried to cinch up the negative battery terminal (imperceptibly) and the lights came back. As they were on, I pushed on the battery some, and the lights flickered. Both terminals were loose- but not visibly so. I thought I'd tightened them both down - or at least checked them - and there was nothing obvious. The next time I tried to start it, all was fine.
Here's a question, though: If there's a loose terminal wire - even slightly loose- what is it about the power flowing through the battery when the starter button is pushed that makes that terminal come disconnected? And can someone tell me which one *should* come off, under those conditions? That is, is it blowing off from the ground side or the power side? And why?
Thanks for any education you can offer!