Car wiring diagrams: Bmw Ground Wire Location, wiring diagram, wire wiring harness, schematic circuit diagram, wiring diagran, wireing diagram, wirring diagram, wiring daigram, wiring diagrams. BMW motorcycle electric starter trouble shooting hints . by Duane Ausherman This page is about the BMW motorcycle models R , R , R , R , R , R .GROM DSP .Connect RED wire to a Volt switched power wire. Should turn on and off with the key ignition or accessory . Red POSI TAP connector has.On E the fuel consumption gage signal and the tach signal connectors are in the glove box. Speed signal wire from pin E connector has to be connected directly .