Brown wire '77 kz650 custom

  • Steel Legion
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Brown wire '77 kz650 custom

03 Aug 2020 21:10
#832185
Hey guys, new here. I am wiring in a new starter button and kill switch. But I've got this pesky brown wire that looks like it is used in everything. It also looks like it could be a hot wire. But on some parts(like lights) it looks like it is a ground. What the heck does it do? I've attached some photos from the wiring diagram to help explain my point.
1977 Kz650c

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  • Bama704
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Re: Brown wire '77 kz650 custom

04 Aug 2020 06:04
#832204
The brown wire is positive. So that makes the the other wires connected to the lights the ground side.
1977 KZ900
Carbs are late model 1975 28mm
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Re: Brown wire '77 kz650 custom

04 Aug 2020 06:17
#832205
Ahh I see. I had just gotten it mixed up because the other lights have a yellow and black going in the location the brown is going in on some other lights and had assumed it was a ground wire. Thanks!
1977 Kz650c

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  • martin_csr
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Re: Brown wire '77 kz650 custom

04 Aug 2020 06:33
#832206
Additionally, the brown wire serves as a voltage sensing wire for the voltage regulator. Some modern reg-recs have the voltage sensing built into the circuitry, so the brown wire isn't needed.

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  • F64
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Re: Brown wire '77 kz650 custom

04 Aug 2020 06:55
#832207
The brown is your 12v positive going INTO the switch. The other wires are your outputs going to your loads.

What does the new switch wiring look like?
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY

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  • Steel Legion
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Re: Brown wire '77 kz650 custom

04 Aug 2020 09:14
#832217
This is the new switch, a k&s 12-0203. It has a blue/white and black going to the starter button. Which I have determined that the black connects to the black from the original switch that travels to the clutch safety switch, and then to the starter relay. It has a red/black and a red/white going to the kill switch. I have determined that the red/white connects to the brown wire. Then the blue/white and red/black are connected together and then connected to the red/yellow from the original switch to complete the connection. Does that sound correct?
1977 Kz650c

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  • F64
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Re: Brown wire '77 kz650 custom

04 Aug 2020 09:43
#832219
It looks like it will work.
81-KZ440-D2.
Louis Dudzik's GM HEI ignitor conversion installed 2015 s3.amazonaws.com/gpzweb/Ignition/GPZgmHEImod.html
Motogadget m-unit blue installed 2017.
LIC, NY
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Re: Brown wire '77 kz650 custom

04 Aug 2020 09:54
#832220
Great thanks.
1977 Kz650c

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