With all the new low voltage electronics, manufacturers like every thing to be grounded. Small static charge can cause problems. There are grounds for almost every thing in aerospace and extras.. :fitz:eekI upgraded to poly bushings n my indy just left the wire off n gave it to me in case there was a problem. That was three years ago n have had no problems since. Don't see why its there in first place if not necessary, ne one no the point of this wire?