GS1100E turn signal 3 wire

[e23mike]

In rebuilding a 1982 gs1100e I have found 3 wires coming from the rear turn signals All the wiring diagrams show only 2. The 3rd wire from each signal had just been taped together with no power supply Those wires were for a low beam bulb as in running lights but when I gave them power off of the tail light wire, the bulbs barely lit up as the wire was too small Any idea what the extra light is for and where the power is supposed to come from

[Rich82GS750TZ]

There is a Gray wire for the License Plate Light in the vicinity on this 1100 wiring diagram. Could be that?
1100 Tail.png

[1978GS750E]

Could it be that someone changed the rear turn signals for a set of front turn signals that have running lights in them?

[rphillips]

Not sure what "barely lit up" means. The running light side of the bulb is supposed to be waaay dimmer than the turn signal side.