Topic: Okay, crazy electrical question....

[d_soles]

So, I have run into some PO woes with my 75 CB550F.  In the right handlebar control pod, There are 3 wires cut off (starter button is missing).  Yellow-red, black-red, and black. 

And then, in the electrical box under the fuel tank, I have 2 blacks cut, along with 2 black-reds cut, ALL of them are twisted together.  And then, the yellow-red wire there is just cut right off.  This sounds like it's starting to get complicated.  Crap.

Any suggestions?  Where the hell is that black-red wire supposed to be?  I can't find it anywhere in the wiring schematic.  The schematic shows a green-red going into the starter switch, and then a yellow-red coming out....why are there 3 for me?

Doug

[TwoTired]

The black red is a headlight power wire.  The original starter switch put power from black onto black red, unless it was pushed, which then routed black onto the Yel/Red to make the starter solenoid trigger.  This way the headlight load is turned off during start operation, allow a higher voltage to the ignition coils.
The original switch likely disintegrated and the owner was too cheap to buy a replacement, then thought himself clever enough the hack the wiring enough to make the bike "work".  Selling his FU to the next bike buyer.

The Black/red, routes to/from the Headlight fuse normally.

The schematic you are using is for an earlier non-F model bike.  Maybe a 74.  Find the correct wire diagram for you bike in the Honda shop manual supplements, available for download elsewhere on this site.  That should help you correct PO "improvements".

Cheers,

[d_soles]

Thanks you very much for that piece of advice.  I now see that signal buzzer is disconnected, as well.  Missing, actually. 

Another question:  I have a disconnected orange wire at the electrical box below the fuel tank.....having a hard time find just an orange wire on the diagrams.  I'm new to these wiring diagrams.  The only one that I can see is for the blinkers, and  only 3 blink.  The front two are on all of the time, the back two aren't.  The front right one also blinks, the front left does not.  The problem being, I cannot find a wire to hook into that disconnected orange one, there is no counterpart (male orange) that I can see in the electrical box under the fuel tank. 

I also have a Green (ground?) that isn't connected to anything....

This wiring stuff sucks.  Grr.

Doug

[bryanj]

There will be a mate for that orange wire somewhere as its a blinker wire, unless the PO "spliced" in a bit of orange from somewhere, where does the one you have come from? (Not just in the box please).

Green is ground and commonly you get "Extras"

[TwoTired]

Orange wires are blinker power, left side. Some of the female connectors take more than one male connection.  The fronts have running lights too,  Either Orange/wht or Blue/wht.  The front signals are supposed to be dual filament bulbs, 1034.  The rears 1073 single filament.


Green wires are frame ground.  And, rather important for making the signals behave correctly.