I had the same issue and like North Western found it was the connection between the permanent feed and the Alarm feed, this joint had corroded and ultimately fallen apart, the joint is in the section of the loom where it comes from under the tank and follows the frame tube down before going behind the LH side panel (infill).
Permanet Feed issue to clocks 1 |
Permanet Feed issue to clocks 1 |
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Permanent feed issue 2 |
The Black wire with Yellow bands is for the alarm permanent feed so if you have removed the alarm it could be discarded.
Hope this gives you some help with sorting your issue, as you can see from the second photo I started checking the loom from the clocks backward and almost had the whole loom unwrapped and pulled off the bike before I found the issue.