The Riverbug
XS650 Enthusiast
This is on the wiring harnes I purchased // I have an 79' xs650f. And it was basically a hack job for the electrical. I haven't found it in the specs.
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What is this???
- Thread starter The Riverbug
- Start date
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- Tags
- electrical
I can't see the profile of the plug or the wire colors, best guess light checker coupler or regulator coupler.
If you want to look in jayel's album he has a '79 SF/2F0 schematic (and others) and the cable/ harness routing.
This is really an F(rare) model? Or the SF or 2F? To make things interesting Yamaha built 3 models for '79.
If you want to look in jayel's album he has a '79 SF/2F0 schematic (and others) and the cable/ harness routing.
This is really an F(rare) model? Or the SF or 2F? To make things interesting Yamaha built 3 models for '79.
Dennis
XS650 Addict
first thought was kick stand but thats 2 wires I believe
Mister Mellow
Big Dreams, Thin Wallet
I've examined my 650D harness a couple of times (I have a box of mystery electronics to hook up), and my light checker connector looks just like yours, and is in the same location. The problem with guessing that this is the light checker connector is that all the diagrams show a yellow, a green/white and a black wire in the connector. Yours appears to have a green/yellow in place of the yellow). This doesn't match up with any wiring diagram I've seen.
Another problem with the light checker guess is that only the 650A through D diagrams show a 3-wire connector. The E & Fs shows 7 wires connecting to the light checker.
Still, I'm thinking the same as weekendrider, that it might go to the light checker. Maybe a mid-model-year re-design. One clue that it may indeed be to the light checker is that the yellow wire in the wiring diagrams becomes a green/yellow wire on its way to the front brake light switch. It may be that this splice was done somewhere else in your harness when manufactured, and therefore doesn't agree with the wiring diagram.
One way to test whether it is tied to the lights is to test to see if green/yellow wire has continuity with the non-powered side of the brake light switch (should be a yellow wire with a plug-connector end. Or, if the battery is connected, the green/yellow wire would show power when either the front or rear brake switches are activated.
Of course, it could just be a GNDN plug (Goes Nowhere, Does Nothing). Do you have an electrical component that plugs into it? If so, picture?
The following is just grain-of-salt stuff. If the above is wrong, just consider this more useless information:
If the connector in the picture is to the light checker, the way these usually work is that the checker would test for continuity through both the tail and brake light filaments (by allowing a very small amount of current to pass through the filaments and a resistor to ground, with the key on. If power is present, the checker does nothing. If absent, the checker acts as a flasher by intermittently connecting the Brake Light Indicator on the dash (via the green/white wire) to ground, completing the circuit for the indicator and causing it to flash. Although I'm not sure, I would guess that the light checker would also test for power from the other wire (In the schematics, a yellow wire, but in your case a green/yellow?) when either brake light switch is activated. If it doesn't see power to this wire, then the checker would do the same and cause the Brake Light Indicator to flash.
Another problem with the light checker guess is that only the 650A through D diagrams show a 3-wire connector. The E & Fs shows 7 wires connecting to the light checker.
Still, I'm thinking the same as weekendrider, that it might go to the light checker. Maybe a mid-model-year re-design. One clue that it may indeed be to the light checker is that the yellow wire in the wiring diagrams becomes a green/yellow wire on its way to the front brake light switch. It may be that this splice was done somewhere else in your harness when manufactured, and therefore doesn't agree with the wiring diagram.
One way to test whether it is tied to the lights is to test to see if green/yellow wire has continuity with the non-powered side of the brake light switch (should be a yellow wire with a plug-connector end. Or, if the battery is connected, the green/yellow wire would show power when either the front or rear brake switches are activated.
Of course, it could just be a GNDN plug (Goes Nowhere, Does Nothing). Do you have an electrical component that plugs into it? If so, picture?
The following is just grain-of-salt stuff. If the above is wrong, just consider this more useless information:
If the connector in the picture is to the light checker, the way these usually work is that the checker would test for continuity through both the tail and brake light filaments (by allowing a very small amount of current to pass through the filaments and a resistor to ground, with the key on. If power is present, the checker does nothing. If absent, the checker acts as a flasher by intermittently connecting the Brake Light Indicator on the dash (via the green/white wire) to ground, completing the circuit for the indicator and causing it to flash. Although I'm not sure, I would guess that the light checker would also test for power from the other wire (In the schematics, a yellow wire, but in your case a green/yellow?) when either brake light switch is activated. If it doesn't see power to this wire, then the checker would do the same and cause the Brake Light Indicator to flash.
Last edited:
rebel542
Old Timer
If it has a Black/White wire in it like I think it does it is for your side stand safety switch. Bet it's been removed.
Well it could be the harness was wired for a side stand switch, but the 79 wasn't.
But if I read the writing on the picture correctly it is a 3 prong.
Maybe the OP will be back with more info.........
But if I read the writing on the picture correctly it is a 3 prong.
Maybe the OP will be back with more info.........
The Riverbug
XS650 Enthusiast
the colors on the connector is green/white,,green/yellow ,,black
The Riverbug
XS650 Enthusiast
maybe you guys can help me id this bike then///2f0-169289 matching frame and motor
