The 3 yellow wires are from the Stator, check the connectors for corosion, Alot of people have removed the connectors and solderd and shrink wrap them for a better connection.
Also good to seporate the wires and nto have them taped up tight.
Sea foam is a great cleaner if not very dirty. I use it all year about a cap full every 3rd tank fill up.
Welcom to the group.
Chad Falstad "Hawk"
2011 HD Ultra Classic "angel"
2001 Nomad 1500 Sold March 2012
2001 VN 750 "Sold June with 2008 with 21,000""Serinity"