I have a 1978 CB550 that I'm trying to resurrect, and have been focusing on clearing up a bunch of electrical issues before I attempt to get it running. So far I've been able to track down every problem except one, I can't seem to get any power to the taillight circuit. I've been using the '76 wiring diagram that's listed as an addendum in the Honda manual that I downloaded from this site (thanks to whomever posted it). Everything seems to match up, except the taillight circuit.
On mine, at the fusebox I have a Brown / Blue wire and a Brown / White wire with no power on either when the ignition is turned on. The '76 schematic shows 2 brown wires at the fusebox, and seems to follow a different path then what I have here.
In my headlight, I have two Brown / Blue wires, one has a male bullet plug, comes from the turn signal switch, and gives me pulsed power when the turn signal is turned on - I believe this fed an MIA turn signal buzzer. The other has a female plug and has continuity back to the fuse box. As near as I can figure out, power should feed from the headlight, down the Brown / Blue wire with the female plug, through the fusebox, back to the headlight on the Brown / White wire where it feeds the instrument panel lights, and the one side of the ignition switch, out the ignition switch on the Brown wire to feed the taillight.
My question is what should the Brown / Blue wire be plugged into? To test to see if my theory on how this circuit was wired was correct, I ran a jumper from a Black plug in the headlight to the Brown / Blue plug that leads back to the fusebox, and the instrument panel lights and the taillight turned tight on.
Any comments would be greatly appreciated.
GregG
