1999 S10 4.3 Auto truck, No crank
I have 99 S10 Truck 4.3 Automatic.
It will not crank with the key.
I can jump it at the starter solenoid with the key on and it will start and run.
I can jump it at the starter relay with the key on and it will start and run.
Turn the key = Nothing.
I have replaced the Neutral safety switch.
Battery is good else it would not jump start
What should I check next?
How can I troubleshoot to get to the cause?
How can I troubleshoot/test the ignition switch?

 

Sounds like an issue in the switch itself or in the wiring from the switch start position to the starter solenoid.

 

If I can jump it at the Starter Relay (not the same as jumping at the starter solenoid) I would think that tells me there is no broken wire from the Relay to the Solenoid.
So there could be an issue between the Switch Start Position and the Start Relay I am not sure where the safety neutral safety fits in.

Is it ignition to the neutral safety to the starter relay to the Starter Solenoid?
or is it
Is it ignition to the starter relay to the neutral safety to the Starter Solenoid?