The stuff going dead might be a misleading clue. Things like the heater fan, radio, and wipers get turned off in the "crank" position by the ignition switch. That switch might be out of adjustment just enough that the rod isn't moving it quite far enough to hit the last contact for the starter system. To check for that, look for 12 volts on the yellow wire at the ignition switch when it's in the "crank" position.
If you do find 12 volts on the yellow wire, feel if the starter relay is clicking when a helper turns the ignition switch. If it is, the neutral safety switch is the best suspect. This is the first time I've seen a starter circuit with a relay and the neutral safety switch is in the relatively high-current starter solenoid circuit. There can be 10 - 15 amps flowing through the ignition switch and neutral safety switch. That is asking a real lot of the neutral safety switch, and it makes a relay pointless. Try cranking the engine after moving the shift lever around the "neutral" position.
If you have 12 volts on the yellow wire and the relay does not click, this is an anti-theft system problem as others have suggested.
Wednesday, April 17th, 2019 AT 3:11 PM