i own a 1978 750 bonneville no start i checked for sprark no spark on cyl 2 its has electronic ignition and the white with black wire to coil seems to be shorted to ground i can remove this wire and my voltage to coil is ok when i plug it on to coil light gets very dim on positive side. do the electonic ignition pieces fail and cause this or do you think the wire is shorted to ground. also the wire to the electronic control were does it run thru the motor and is it hard to access thank you john