Can anyone give me some insight to how this system works. It has 2 spare batteries in the seatbag and the toogle switch can be turned both ways. There also is a horn hooked up to it. When riding the horn barely makes a noise. it might be due to not enough charge. Will it recharge the batteries while riding, or do I have to chargethem myself.

No idea but thats fred-tastic

Holy cow, I haven't seen a lighting setup like that for at least 30 years. :-) Without a wiring diagram, nobody's going to be able to tell you what it's supposed to be doing.

However, I would guess that the bottle-gen is intended to charge the batteries, and they'd be used as the power source light a stand-light. If those are lead-acid batteries ( which I suspect they are ), then the generator isn't likely be generating nearly enough voltage to charge them directly. It looks like the generator claims "12V" on the side, but you need approximately 14.1V to charge the battery. If the batteries are more than a couple of years old ( or much less, if they're being improperly charged ) then they're probably shot, anyway.

This is the sort of setup where you can immediately evaluate the quality of the work by assuming an inverse relationship between the amount of cheap electrical tape and construction quality. ;-)

I like the horn!

I know nothing about that design. Just by looking at the picture, I think the two batteries are in series, in which case, there is a remote chance each battery might be six volt each and two in series will give out 12v. If on of those two are bad, than it will not charge.

The toggle switch looks as if one blade connector is not hook up in the picture. That would be the terminal on the right in that picture. If that is the case. The switch only makes if it is in the right position and what ever those wires on each of those terminal will make. Trace out those wires from the switch and see where they go. Maybe they go to the horn but who knows unless you trace them out.

Is that small square box behind the switch part of the setup? I'm thinking maybe a rectifier?

I guess I have my work cut out for me this weekend. When riding the lights do work.