First of all apologies if this is covered in a dozen other posts. I haven't figured out how to do a proper search within just this forum. Wanted to pump my spare tank empty with it off the bike. After some work/research found that the appropriate power feeds at the connector that comes from under the tank are the BROWN (negative) and GREEN (positive) wires. If for some reason there are objections/corrections please say so. But these worked for me.

best regards
J.

My hands still stink of gas.

I use one of these to empty my tanks.
[url=https://www.zoro.com/dayton-hand-drum-pump-siphon-polyethylene-38y789/i/G5296532/feature-product?utm_source=google&utm_medium=surfaces&utm_campaign=shopping feed&utm_content=free google shopping clicks&gclid=Cj0KCQiAkNiMBhCxARIsAIDDKNXry-cpTLAm5aueyd8YXXylqW-GxNbU4dVcY-xJdIAlVArzUHnDFAcaAgm2EALw_wcB]https://www.zoro.com/dayton-hand-drum-pump-siphon-polyethylene-38y789/i/G5296532/feature-product?utm_source=google&utm_medium=surfaces&utm_campaign=shopping%20feed&utm_content=free%20google%20shopping%20clicks&gclid=Cj0KCQiAkNiMBhCxARIsAIDDKNXry-cpTLAm5aueyd8YXXylqW-GxNbU4dVcY-xJdIAlVArzUHnDFAcaAgm2EALw_wcB[/url]

Looks good but I didn't want to wait a week so just went ahead today. Still left a little fuel in the tank.