Anyone have a wiring diagram or insite as to why a yale glp50vx vortec v6 won't start?. I assumed ignition module had failed as no spark to the plugs. On further investigation I have a good spark coming from coil to distributor cap and that's where it ends. Cap and rotor button would be less than 12.months old and seem ok.. distributor is turning when cranking. Any advice would be appreciated or a wiring diagram..