Vulcan 900 wiring- frame ground under tank? - Kawasaki Motorcycle Forums
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post #1 of 3 (permalink) Old 03-28-2019, 12:33 PM Thread Starter
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Join Date: Feb 2019
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Vulcan 900 wiring- frame ground under tank?

This feels like a dumb question, but I've got a bit of a mess on my hands. Useless backstory: My 07 900 Classic had a previous owner with some, ahem, "interesting" notions about how to wire an aftermarket horn onto the bike and butchered the wiring harness. I got tired of bodging the bodge-job into working and bought a replacement wiring harness on ebay to wipe the slate clean.

The new wiring harness came from an 09 900 Custom. Nearly everything corresponds to the original wiring harness but on the new harness there is what looks like a grounding terminal that would be under the tank, above the center of the engine, just ahead of the air cleaner (if you've taken the tank off, there are two knobs that locate the tank, and the terminal is right next to them). My old wiring harness doesn't have a matching terminal so I don't know where it attaches. I don't know if there was a change between model years that added this ground terminal, or if the PO figured he didn't need it and cut it off. There is another frame ground farther forward, near the radiator. Worst case scenario I could cut the terminal, extend the line forward to that frame ground, but half-thought-out "cut it and make it work" is what got me in this mess in the first place.

The picture uploader doesn't seem to like me, I'll try to post a picture in a minute to show what I mean.
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post #2 of 3 (permalink) Old 03-28-2019, 04:38 PM
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Join Date: Oct 2018
Location: New Brunswick, Canada
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What color is the wire? I assume it has ring terminal on the end? My ZN 1100 has a yellow/black wire with a ring terminal under the tank and it is a ground and it gets connected to the mounting plate that holds the ignition coils. To make sure it is a ground get a tester and see if you have a connection between it and the wire that goes to your battery negative, or to any other grounded wire.
If it is a ground, make sure you clean any paint or rust off wherever you make the ground connection and then cover with dielectric grease.
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post #3 of 3 (permalink) Old 03-28-2019, 08:55 PM Thread Starter
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Yeah it's yellow-black and has a ring terminal, and it's about in the right place to go over to the ignition coil mount on the opposite side of the frame. I'll take a look tomorrow once it's light out

Last edited by b0mber; 03-28-2019 at 08:55 PM. Reason: tweaking
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