So this might be a shot in the dark, but it's still a shot.
I've been busy working and at school (graduating and all kind of occupied my time), and I've finally rolled out my bike to finish it before I go to London for grad school in mid-September. So far, I've installed a new exhaust adapter and muffler, and made a brace to attach it to the footpeg mount. Fixed the sticking throttle, too - turns out, I had glued the grip on with tacky glue, and over time it had turned into brown shards that practically fused the grip to the handlebars. Messy, but I got that working great without having to reroute my cables. But I installed my battery today, flicked the key to ON, and...nothing.
Well, not exactly nothing. The neutral and oil lights both illuminate, and the neutral light shuts off when I switch into gear, as it's supposed to. The battery reads approx. 12 volts, and it's been on a trickle charge for a week now. I have the coils disconnected, as I'm about to install the Nighthawk ones, including the ground there.
Last summer, the wiring was rebuilt, and all the headlights, tailights, turn signals, idiot lights, etc. worked perfectly - there was just a problem of the battery cutting out. This year, I have the exact opposite problem. A quick one-over of the harness indicates that nothing's been out of place or been gnawed by rodents. The problem is, I don't even know where to start diagnosing it. I'll have to take a look at it some other time when I'm not so tired and actually have time to think, but for now, with everything I described above, where should I start checking?