Extra Wire!?!?!?!?!?!?!

[ATC_250SX]

OK here is the question, i was examining my 85 250sx and i saw an extra wire hanging from the harness. it is at the end by the headset and it is a brown wire. every so often it has two tine white dots in a row then its plain brown there is no stripe or anything else. any suggestions would be great or even another thing i would like would be a wireing diagram.
~Thanx,
Atc_250SX

[ATCnut]

Here is the diragram. Looks like it is a extra light wire, see it in the row of connectors toward the left side

[ATC_250SX]

thanx the diagram dose show the extra wire. thats a weird one.

[Black Sheep]

its for a hondaline accesory like a speedometer or tachometer it runs the light in the guage

[ATC_250SX]

thanks. now if i put something on the handlebars needing power i know where to get it.