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Wires to nowhere?

glib

glib

Forum Mentor
Past Site Supporter
These are under the cowling of my GS1100ES. They come from the same part of the wiring harness as the headlight wires. What are they for?

 
black/white tracer is a ground.
be aware that every wire from the harness doesn't necessarily go somewhere.
 
Hard to tell, but if the yellow wire has a black line they could be for the fuel gauge. Do they happen to be near the tank/seat interface?
 
There's a "free" brown wire on both my 78 1000 and my 85 750EF,the EF has a black /white tracer as well.I use it to run my voltmeter.
 
Seems like I remember a set of color codes somewhere in the manual :(
 
posplayr said:
Seems like I remember a set of color codes somewhere in the manual :(
Click to expand...

That's why I was asking about the yellow/black wire since it and a black/white correspond to the wire combination that goes to the fuel gauge and seems to be overlooked by so many.
 
These are just behind the headlight. The fuel gauge does not work and I did find the yellow and black wire that goes down from the dash into the main part of the harness but I have not followed it to the other end yet.
 
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Does your headlight have a "park" bulb in it? IE: a smaller 5w bulb?

If not, it might be for that. Different countries have different regulations for park lighting specs, so Suzuki would have made a universal harness for all countries and just not connected what they didn't use.
 
I see that the GS1100E model wiring harness is available but the ES model harness is "obsolete." Where do we go for a replacement?
 
glib said:
I see that the GS1100E model wiring harness is available but the ES model harness is "obsolete." Where do we go for a replacement?
Click to expand...


Your best bet is to refurbish what you have, the ESD's are rare so there are not too many used ones around for sale and there are no factory parts available. The ED/EX harness is pretty different to the ESD mainly due to the clocks with the electronic RPM. I did a coil relay mod for a memeber on his ESD and I was surprised how much different the harness was from the ED.

If you have connector damage, most of those can be replaced. If you do pickup a new ED, it would probably be possible to convert it to a ESD harness using parts from your old harness but that would takes some engineering I would assume. Where a refurb is just parts swapping.

Those spare wires are also on almost every other GS , they are a ground (B/W) and a Signal wire(for driving lights if you choose). The Brown, Grey and O/G are all connected . If you look at the schematic you will see how they connect through the ignition switch .
 
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I used those two spare wires to power running lights in my front turn signals. I installed some later model GS turn signals on my 750 just to have them. I spliced both running lights into the spare signal wire plugs, the grey one and the brown I believe. I used a current tester to determine the ones who had power with lights on.
 
hillsy said:
Does your headlight have a "park" bulb in it? IE: a smaller 5w bulb?

If not, it might be for that. Different countries have different regulations for park lighting specs, so Suzuki would have made a universal harness for all countries and just not connected what they didn't use.
Click to expand...

Yep, they're for the "parking" or "city" light circuit and only used in certain countries. I believe it's a small low-wattage bulb intended to illuminate the headlight so you're still somewhat visible with the main headlamp off. Lots of bikes have this circuit -- in the US, it's just not connected to anything since our regulations require that the headlight always stays on.
 
Thank you for the info! Funny how you feel great about acquiring a hard to find model--and then you find out some important parts are hard to find too...hope I never crack the headlight!
 
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