Wiring help

toastyhamster · Post by **toastyhamster** » Wed Apr 15, 2009 1:47 pm

My loom (CB72 1964) is a bit hacked about around the battery area. It's mostly intact except I have a black/white wire from the rectifier going to what I think is the earth battery terminal and I have a thick (starter solenoid thickness) wire attached to it which looks like it should be attached to an engine bolt - is this correct? The parts manual isn't 100% clear but it looks like that may be the case.

Engine is back in, will update my resto thread at the weekend with pics

e3steve · Post by **e3steve** » Sun Apr 19, 2009 10:49 am

Toast, the battery -ve grounds at one of the two toolbox bolts.

The bk/w runs from ignition switch, terminal IG, into the headlamp to feed the headlight switch (also terminal IG) and the neutral light, with 'drop-offs' to the stop switch, starter solenoid and horn.

jleewebb · Post by **jleewebb** » Sun Apr 19, 2009 10:01 pm

My "buttery earth cable" (see wiring diagram) grounds to engine bolt. (62 cb77). Maybe your cable's a little short?

Great job on the coloured wiring diagram by the way, a real e3steve classic. Thanks, Lee

e3steve · Post by **e3steve** » Mon Apr 20, 2009 2:18 am

Thanks Lee, on both counts! The colour sure makes it easier to follow.

My grounding cable certainly looks OE, with the flag-type lugs at each end, but my CB's a bit of a mutt, so I'm not sure which parts are '61, '64, other years and AM Honda.

Needless to say, I'm waiting for a celestial, lm-type intervention now.....

edited because I missed a comma!

toastyhamster · Post by **toastyhamster** » Mon Apr 20, 2009 9:56 am

My ground cable fits the engine bolt, so that's where it's gone. The Bk/w wire runs to the rectifier though and was definitely bodged to the earth connector on the battery. I'll have another look to see tonight and maybe post a pic.

edit: Here's the pic - is this an original rectifier? Looks a bit like one to me, the bk/w cable at the bottom of the pic was connected to the earth connector on the battery.

http://www.toastyhamster.plus.com/cb72%20011.jpg

e3steve · Post by **e3steve** » Mon Apr 20, 2009 2:37 pm

No way, Pedro! That's AM.

The wires are added, also. That black/white is, in fact, white/black (main colour/tracer). The bk/gn to the fuseholder is a tack-on too.

If it was mine, I'd be partly rewiring with the correct colours. You need short lengths of 2.5mm²: green for the rec ground, red for the fuse holder. Let me know if you need more help.

toastyhamster · Post by **toastyhamster** » Mon Apr 20, 2009 3:15 pm

Ah well, I have a newer (untested) rectifier of the style currently on ebay, so I'll put that in with the correct wiring. Thanks