That may be your problem. The headlight and taillight circuits are supposed to be two separate circuits, with their only common point of connection being through the ignition switch when it's turned to 'on'. The headlight and gauge lights don't come on until the bike starts and the alternator puts out enough voltage to close the headlight relay. You need to trace the taillight circuit; it should come from the taillight to the fuse panel, and from there to the ignition switch, all wire should be blue. Unless the harness has been altered, that's what you should find.
But if the new switch isn't working right, this won't matter. Check the replacement switch as per post 5 to make sure it's functioning correctly. If it is, the problem is in the harness. If it is a bad switch, send it back and contact Andreas in the 'parts for sale' forum, I'm sure he can supply you with a good used switch. As TC said, you can steal parts off the new switch to repair a OEM switch and rekey it.
But if the new switch isn't working right, this won't matter. Check the replacement switch as per post 5 to make sure it's functioning correctly. If it is, the problem is in the harness. If it is a bad switch, send it back and contact Andreas in the 'parts for sale' forum, I'm sure he can supply you with a good used switch. As TC said, you can steal parts off the new switch to repair a OEM switch and rekey it.
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