Ignore glow relay. Power flows to starter via violet wire from neutral safety switch. Goes into switch on violet/white wire from ignition switch. Goes into ignition switch on big red wires. Real simple path. Try taking the connections loose on the right side fender and clean them real good. I have seen bad connections there cause headaches. Just be careful. The big wires go directly to battery and alternator. Ignition switches go bad all the time. Almost all my cars have had one replaced at one time or another. Of course also try moving the shifter while holding the key at "start". Just have both feet firmly on the brake when you do it!!