Topic: Control wiring

[DEklof]

Does anyone have a wiring diagram for a late 1977 CB550F?  I recently replaced the sterring head bearings with tapered rollers and to do so it was necessary to disconnect some of the wiring in the headlight shell.

Dumb me, I assumed I could just reconnect everything per the wiring diagram in my Clymer's manual.  Nope.  The wiring diagram in my manual shows a headlight switch and only a single turn signal dash indicator.  My CB has no headlight switch and both a left and a right dash turn indicator.

Off I go to the internet (including this site) but every 550 wiring diagram I have found is the same as the Clymer's. 

Does anyone have a proper diagram for the later CB550s with no headlight switch and dual turn indicater dash lights?  Alternatively, does anyone on the forum have a clue how to compensate?

Thanks.

[Don R]

http://manuals.sohc4.net/cb550/owners_manual/OM55078.pdf

 Usually, the color of the wires match on both ends. It appears the indicator wires are orange and blue just like the turn signals.

[Kenzo1979]

There's this diagram.

[Deltarider]

First step is to identify your exact model. You can do that by comparing the engine- and framenumber of yours with those listed in the first few pages of the various CB550F parts lists. They are all here: https://www.honda4fun.com/materiale/documentazione-tecnica There is the CB550F, the CB550F1 and the CB550F2, each with different wirings for various markets. One model can have 4 different wiring diagrams.Then consult the appropiate wiring diagram in the Shop Manual Honda CB500-CB550: https://www.dropbox.com/s/88zdzlj8olqi8pl/Honda%20CB500_CB550%20%20Four%20Service%20Manual.pdf?dl=0

[Kevin D]

DEklof, echoing Dons comment, match wire color for correct wiring.
I have wired hundreds of Hondas, all new, and never once needed a wiring diagram, and no mistakes, by following color coded wiring.
Of course 50 years of age and the wires don’t have have as much color as when new.
Modifications from stock might change colors.
Look in the faq for more info on wire colors/functions:
http://forums.sohc4.net/index.php/topic,1012.msg188242.html#msg188242

[Kenzo1979]

Yeah but some of the later models had some tricky things going on. One being a jumper needed to supply ignition power to Brown/White.  The jumper wire goes between a black wire and a brown/white wire to bring that power over. That can be a bit confusing if you’re not used to that from previous models not having it.  They put colored tubes (shrink wrap) On certain connectors to distinguish them on the wiring diagram.  There’s also that spare brown female in the bucket that tricks people who are new to these bikes at first, in the US anyway, it goes unused.  For the most part you can just go color to color and have no problems, but it is nice to have a wiring diagram and be able to trace it all out. And definitely the right diagram. You can also find diagrams for other models that may help you better understand your own bike based on similar layout. I found a schematic for a 750 that was helping me trace some wiring on a 76 550K better than some of the 550K diagrams I was looking at.  Mostly because of all the different safety designs they installed later, like the ignition safety modules/diode, clutch safety and headlight kill during electric start, etc.


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[DEklof]

Thanks to all who commented on my post.  I think I have everything I need. The diagram from Kenzo1979 was the closest to mine in that it had no headlight on/off switch.  The other comments were helpful in sorting the turn signal hookups.  I think I will be good to go. 

Wish it was together today as it is almost 70 degrees out, but tomorrow it will be in the low 30s and on Friday they say we will get as much as a foot of new snow.

I started on this project because I had some suspension hop that I couldn't figure out. The new Ikon shocks and front springs, new Bridgestone Spitfires (professionally balanced) I installed last summer didn't cure it, so this winter I went after all of the other possible causes I could think of: New tapered roller head bearings, new Race-Tek cartridge emulators and Race-Tech front springs, new sprockets and chain, and new Excel alloy wheels with SS spokes on my original hubs (done by Buchanan's in California).  Did I miss anything? 

Of course, as with most projects of this sort, "while you're at its" set in and there was also a lot of buffing aluminum and replating of small parts.

Waiting on new tire flaps to arrive, then remounting and balancing my Bridgestones.  Also awaiting a new rear sprocket oil seal, and some new stainless allen screws, then I will be all set.

Can't wait to try it out the next time weather permits.  Thanks everyone for the help.

Attached photo is as I bought it from Bring-a-Trailer last May.

Dennis

[DEklof]

Good thought. I already checked once but will recheck.  Thanks