My best guess is that you don't have an OEM R/R on there. The 3 yellows from the alt is fairly standard in the industry - the other 4 - on the OEM the two pairs join up further along to supply current and ground to the system. Yours probably do the same but are colored differently. It would seem the best diagnostic at this point is to snip back tape until you can find what those 4 wires lead to. The simplest approach is to ditch that R/R and get an 847 from Roadster cycle and be done with it. Remove the existing R/R, cut the 4 wires and tape them off. One you see how he 847 installs you'll understand.
5th Gen Super High Resolution Wiring Diagrams
in Owners Manuals and other
571 7Posted
My best guess is that you don't have an OEM R/R on there. The 3 yellows from the alt is fairly standard in the industry - the other 4 - on the OEM the two pairs join up further along to supply current and ground to the system. Yours probably do the same but are colored differently. It would seem the best diagnostic at this point is to snip back tape until you can find what those 4 wires lead to. The simplest approach is to ditch that R/R and get an 847 from Roadster cycle and be done with it. Remove the existing R/R, cut the 4 wires and tape them off. One you see how he 847 installs you'll understand.