Can you check that it is the 412-411 (for 2004-2005 Yamaha XT660-R) ?

That plug doesn't look like any on my two Power Commanders nor is there a grey? lead on mine.

Two plugs go in-line to the main wiring harness and two go in-line of the throttle position sensor whilst the battery lead goes to the negative terminal - not the power supply.

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