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Author Topic: Simplified Wiring Digrams  (Read 71432 times)

Offline Sonreir

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Simplified Wiring Digrams
« on: Aug 08, 2013, 12:09:46 »
This simplified wiring diagram will work for most Honda singles and twins with an alternator with a single yellow, single pink, and single white wire and a regulator that has a green, yellow, and black wire.

That includes all flavors of the CB160, CB175, CB200, CB350, CB360, and most of the 450s.  Works for the small singles like the 125, too.  Possibly some of the off-road variants like the XLs and XRs?

This diagram uses a Kohler Regulator/Rectifier to replace the stock regulator and rectifier.  Horn and starter motor are not included.  Also, wiring is for the LED turn signal conversion.

Special thanks to www.oldmanhonda.com as I borrowed some of their graphics to make this diagram.
« Last Edit: Aug 08, 2013, 12:30:52 by Sonreir »
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
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Offline Bert Jan

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Re: Simplified Wiring Digrams
« Reply #1 on: Aug 08, 2013, 12:12:46 »
nice you did it the proper way. so many new kids asking the same question over and over. now we can refer to this and be done with it. ill post up some diagrams i made tonight when i get home.
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Offline nrcb125

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Re: Simplified Wiring Digrams
« Reply #2 on: Aug 08, 2013, 13:08:35 »
I think this is WAY oversimplified. It doesn't even show the ground wires coming off anything except the battery. The wire colors are also not true to what's on the bikes (at least for my CB125). This is confusing and misinformative.

The problem is not the wiring diagram, the problem is people don't know how to read and/or interpret them. Below is my 'simplified' version of the wiring diagram for my CB125S.
'73 CB125S - current project
'99 EX500 - Race Bike


CB125S build thread (haven't updated in 5ever): http://www.dotheton.com/forum/index.php?topic=43403

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #3 on: Aug 08, 2013, 13:20:02 »
I think this is WAY oversimplified. It doesn't even show the ground wires coming off anything except the battery. The wire colors are also not true to what's on the bikes (at least for my CB125). This is confusing and misinformative.

The problem is not the wiring diagram, the problem is people don't know how to read and/or interpret them. Below is my 'simplified' version of the wiring diagram for my CB125S.

The wiring diagram in the original post is what I use when making wiring harnesses.  Some of the colors are non-stock because dual-color wire is not easily available for a decent price.  In those cases, the connectors are shown where it joins.  Also, this is a "1-wire" diagram because it is known than all electrical components will need a ground.  Displaying it further complicates the issue.

So yeah, maybe I should have prefaced it with something along the lines of, "If you're brand new to wiring, you'll want to keep a few things in mind...".

But regardless, the purpose of this diagram is not to display what is already going on with the stock harness, but to provide a useful tool when tackling your own wiring changes (or even a completely new harness).  The stock colors fall second to providing a functional harness.

Also... in your diagram, the yellow/white wire is superfluous.  Splice the white in with the yellow and remove the other wiring run.
« Last Edit: Aug 08, 2013, 13:24:07 by Sonreir »
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline nrcb125

  • Posts: 280
Re: Simplified Wiring Digrams
« Reply #4 on: Aug 08, 2013, 13:30:09 »
The wiring diagram in the original post is what I use when making wiring harnesses.  Some of the colors are non-stock because dual-color wire is not easily available for a decent price.  In those cases, the connectors are shown where it joins.  Also, this is a "1-wire" diagram because it is known than all electrical components will need a ground.  Displaying it further complicates the issue.

So yeah, maybe I should have prefaced it with something along the lines of, "If you're brand new to wiring, you'll want to keep a few things in mind...".

But regardless, the purpose of this diagram is not to display what is already going on with the stock harness, but to provide a useful tool when tackling your own wiring changes (or even a completely new harness).  The stock colors fall second to providing a functional harness.
Ah okay. That makes more sense.

Also... in your diagram, the yellow/white wire is superfluous.  Splice the white in with the yellow and remove the other wiring run.
I figured this out by inspecting the old switch and wondering what the hell Honda was smoking in the 70s. In Honda's original diagram by some sort of wizardry (the right hand switch) the wire changes colors. It's a bit handy to know in case you're looking at the original harness and switches.
'73 CB125S - current project
'99 EX500 - Race Bike


CB125S build thread (haven't updated in 5ever): http://www.dotheton.com/forum/index.php?topic=43403

Offline firebane

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Re: Simplified Wiring Digrams
« Reply #5 on: Aug 08, 2013, 13:31:22 »
What are you guys using to draw these wiring diagrams?

Offline nrcb125

  • Posts: 280
Re: Simplified Wiring Digrams
« Reply #6 on: Aug 08, 2013, 13:41:38 »
What are you guys using to draw these wiring diagrams?
I've been using GIMP (http://www.gimp.org/). It's a free, open source Photoshop clone. I made a layer for the background and the old wiring diagram. Then for each color of wire and the components I traced over the old wiring diagram using a new layer. It's tedious but well worth it.
'73 CB125S - current project
'99 EX500 - Race Bike


CB125S build thread (haven't updated in 5ever): http://www.dotheton.com/forum/index.php?topic=43403

Offline Sonreir

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Re: Simplified Wiring Digrams
« Reply #7 on: Aug 08, 2013, 13:53:17 »
Paint.NET for me.  Unfortunately, I don't know of any diagramming programs that are quick and easy... Maybe I should write one?
Sparck Moto - http://www.sparckmoto.com

Audaces fortuna iuvat.

1977 Honda CJ360 - Café SOS - Stage One™, Café SOS - Stage Two™
1976 Puch Maxi - APuchalypse Now
Suzi T500 Cobra Resto

Custom Gauge Graphics
Custom Wiring Harnesses

DTT Red, White, and/or Black 360 Club - Better than those Blue guys

Offline JohnGoFast

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Re: Simplified Wiring Digrams
« Reply #8 on: Aug 08, 2013, 14:10:31 »
Paint.NET for me.  Unfortunately, I don't know of any diagramming programs that are quick and easy... Maybe I should write one?

You should and share it for a small fee. ;)

Offline VTNick7

  • Posts: 135
  • '76 CB550F
Re: Simplified Wiring Digrams
« Reply #9 on: Aug 08, 2013, 14:14:50 »
Paint.NET for me.  Unfortunately, I don't know of any diagramming programs that are quick and easy... Maybe I should write one?

PSpice?