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TOPIC: Wiring Question For The Experts Or Those That Know...

Wiring Question For The Experts Or Those That Know... 14 Jan 2020 18:34 #817088

  • Rick H.
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I am trying to clean up some wiring issues on my '77 KZ-1000A1 and have come to a roadblock of sorts as I don't have a decent schematic of the wiring on my bike. Under the left side cover are three white wires that I think meet at a triple connector. I am not sure of this because over the last six months more has been done to this bike than I care to remember. Does anyone know if these 3 white wires actually come together at this connector? I have included a picture to show the connector.

Underneath the triple connector is another two wire connector that has a white wire meeting up and connecting to a white wire with a red stripe. Is this the proper joining of these two wires? I have attached a picture of this connection also.

Thanks in advance for any help on this.
Rick H.
Rick H.

1977 Kawasaki KZ-1000A1
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Wiring Question For The Experts Or Those That Know... 14 Jan 2020 21:41 #817097

  • TexasKZ
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There is a decent schematic in this manual that may answer your question.

www.kzrider.com/modules/ServiceManuals/K...Service%20Manual.pdf
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 06:31 #817105

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That manual seems to cover the 1000-A2 & some later models >> I did not see a wiring diagram for the A1 & there could be differences.

You could physically trace the wires to see where they lead. White & white-red are typically power wires, so depending upon the model, they would go to the battery pos (+), main fuse & ignition switch and probably the voltage regulator &/or rectifier.
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 06:40 #817106

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Oops, Martin is right. That diagram may not be helpful.
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD awaiting resurrection
2000 ZRX1100 not ridden enough

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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 07:16 #817111

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Okay, thanks for the replies. Typically I don't take wires apart until I label them in some fashion so I know how to reattach them. I don't know or recall if I took these wires apart or one of my youthful helpers did in haste to remove the side cover at some point. Looking at the diagrams I can't locate a white wire with a red tracer as is in the photo I attached. In all honesty the diagrams are pretty sketchy in many respects, but I haven't looked at a wiring diagram in a long time. It just seems odd to me that they would run a solid white wire into a white wire with a red tracer and not show that on the diagram. I'll just try to track the wires and see where they go in relation to the diagram and not rely so much on color as path. I just thought someone would know or would have seen these wires as they are staring you in the face when you take the side cover off. And unfortunately I don't know if there is a difference in wiring between the A1's and A2's etc. To make matters more confusing the SM I have is a black and white copy I purchased off Fleabay. It has been okay for most of the stuff I needed it for, but I don't know if the wiring diagram in an original manual was in color which would help I would think.
Rick H.
Rick H.

1977 Kawasaki KZ-1000A1

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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 07:26 #817113

  • jayrodoh
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I haven't owned a 70's Kaw in quite some time, but IIRC the connector in your first picture comes from the battery and then has two wires on the double bullet side. One goes to the fusebox and the other goes to the rectifier. The single connector should come back from the fusebox and fees the main harness up to the keyswitch. I think Red/White comes back from fusebox but I could be wrong.

I'd say follow the wires and see. No guarantees on my info but maybe it will help.
1982 KZ750-M1 CSR
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 07:50 #817120

  • SWest
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The W wire goes to the double connector along with the one from the R/R. From there the W wire goes through the fuse box coming out as a R/W wire going to the + terminal of the battery going by memory of course. :unsure:
Steve
Z1b1000 1975 Z1b
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 09:57 #817133

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So can I assume from what I see on mine that the main fuse and the rectifier are "hot" all the time with ignition switch on or off?

Rick H.
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1977 Kawasaki KZ-1000A1

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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 11:58 #817143

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Yes Rick
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 12:50 #817146

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Scirocco wrote: Yes Rick


X2 on this.
1982 KZ750-M1 CSR
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Wiring Question For The Experts Or Those That Know... 15 Jan 2020 13:43 #817149

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Thanks Guys! Not having a good wiring diagram isn't helping my progress much. I noticed that there is a black wire (ground/earth I assume) that comes off the rectifier and I think it should go with the rest of the wires from the rectifier into a 6 pin plug. One of the wiring diagrams I have shows the plug from the rectifier should have 4 wires in it, but my plug only has 3 yellow wires. It appears that someone removed the black wire from the plug and ran it to a makeshift ground next to and in front of the battery box. They installed a cheapo wire end on the black wire and attached it to the frame via an existing bolt. This makes me wonder if a previous owner wasn't trying to fix something the easy way, instead of the right way. Has anyone ever seen something like this before on the rectifier ground wire?
Rick H.
Rick H.

1977 Kawasaki KZ-1000A1
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 01:03 #817175

  • kevski
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The black from the rectifier usually goes into a yellow on black wire which then goes back to the battery and other systems, are you still using the original separate regulator and rectifiers or a combined modern unit?
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 03:39 #817178

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No this bike still has the original separate units.

Rick H.
Rick H.

1977 Kawasaki KZ-1000A1

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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 05:10 #817182

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That's the way mine is. I'd rather a positive ground rather than having to go through the loom.
Steve
Z1b1000 1975 Z1b
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 07:47 #817196

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SWest wrote: That's the way mine is. I'd rather a positive ground rather than having to go through the loom.
Steve


The more that I look at this wiring harness and the wear it has taken over the years the more convinced I am to replace the darn thing. I didn't want to get involved in changing out the harness, but when I saw the fuse holder was half melted away and some other issues I am leaning more towards putting in a new harness. Obviously I can't locate an OEM harness, but there are several after market harness suppliers. Does anyone know which of the available harnesses out there are best? I have never been real handy with wiring changes, so I would like to keep it as easy as possible.
Rick H.
Rick H.

1977 Kawasaki KZ-1000A1

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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 08:48 #817205

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The white wire going through that pin connector is the weak link. It is so small it gets hot and fries causing a cascading effect. I would have rather kept it stock but every one I've seen has the same problem.
Steve
Z1b1000 1975 Z1b
Opinions expressed by me do not reflect those of the the staff or members
kzrider.com/forum/11-projects/598262-kz-...-will-it-live#672882
kzrider.com/forum/2-engine/597654-poser?start=240#704229
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 10:51 #817211

  • 73z1
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>>> "This makes me wonder if a previous owner wasn't trying to fix something the easy way, instead of the right way. Has anyone ever seen something like this before on the rectifier ground wire?"
The 73 rectifier ground and regulator ground ran through the harness, in late 73 or early 74 they have separate ground wires that bolt to engine near kick starter.
Your harness looks nice, I would replace fuse holder and attached hot wire to battery terminal (original attaches to solenoid lead.
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 11:18 #817212

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Not sure if his will help you or not. But here is a wiring diagram I have for 75 and 76 models.
1977 KZ650 B1
Pods and Denco header


This is my Z

OLD KAW OWNERS SMILE ALOT
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Wiring Question For The Experts Or Those That Know... 16 Jan 2020 12:26 #817214

  • kevski
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The 3 whites together are correct, on the double side one goes to the fuse box, one to the rectifier and on the single end to the battery, the pair lower down near your chain guard you have a red on white coming out of the fuse box and the white going to the ignition switch, if your fuse box has melted it would be wise to get a New one with the emphasis on New, also clean all the connectors and make sure they are a snug fit, and lastly wherever possible turn any tight kinks in the wires to curves as kinks create a resistance and this can blow fuses and cause burning also make sure you have good earths, a smear of copper grease will aid with the earth connections.
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Last edit: by kevski.

Wiring Question For The Experts Or Those That Know... 17 Jan 2020 05:00 #817245

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Perhaps this would help. Click to expand.



Fair warning; we're not familiar with KZ1000's, therefore we're not 'expert' (ex-spurt)
ex = has-been
spurt = a drip under pressure

but...

That frame GND. looks sketchy. Suggest to go direct to motor case GND, bypassing any pin connectors. If there's a GND. connection above the kickstarter on the right rear motor mount tab, use that.

Good Ridin'
slmjim & Z1BEBE
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1973 Z1 x2
1973 Z1 "The Wounded Z" Resto project
1974 Z1-A x2
1975 Z1-B x2
1993 CB 750 Nighthawk x2
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Last edit: by slmjim+Z1BEBE. Reason: Insert larger image
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