I recently had a charging problem with my 929 and i tracked it down to the rectifier/regulator, in the process i believe something shirted the tach some how because the lights comes on so do the signal indicators lcd display does not and im looking for shorted wires in the harness. blue/red wire has ground when off and power when on is this normal. from the diagram i believe its for the oil pressure gauge ? light does not come on i have circuit tester and multimeter what do i check next