I am having troubles with my 1978 Honda Express NC50. The headlight will only turn on if I have the light in the "Hi" position, and it is still quite dim when in the "Hi" position. I also cannot get the horn or the taillights to work. I have checked the wires on the inside of the headlight bezel and they all appear to be attached/plugged in. Could I have a ground problem? This does not have a battery, did they come with them? Any help will be appreciated.