No power at key switch

Could have faulty starter relay that provides crank signal voltage to starter when key is turned to start. Assume the no voltage to plugs or fuel pump performed when jumping the starter directly at the starter. Was the key turned to run position? Needs to be or no power to rest of system.

The start switch ? Do you mean the starter relay your jumping the solenoid on the starter and it starts right but when your in the vehicle and you turn the key you get nothing right if this is correct the starter relay is no good when you turn your key in the steering column lock that moves the ignition switch on the steering column sending voltage to the relay then the relay sends it to the solenoid which then powers up the stater motor then it cranks the engine//// so the relay is bad

what happened when you tried jumping the car? sounds like it could be a bad ignition switch since only non-switched things work.

From the ignition switch there is a yellow wire that is for the starter. probe it when trying to start. If you have no voltage replace the switch. Also, I believe there is a fusible link in the wire by the starter. It will be a different color than purple. Probe on the back side of it to see if there is voltage at start up. If so, replace with the smae color link.

I think the purple wire (or maybe the yellow) from the neutral safety switch goes to the coil side of the starter relay, turning it on so power is sent from there to the starter solenoid. You could check for this signal to the relay with a test light. The key must be held in start while you probe the other two terminals for the relay. If the signal is there, either a bad relay or the coil side of relay is not grounded properly. It is possible that the coil side ground is the neutral safety switch-grounding the relay's coil side only in park or neutral-in which case the nagging light on shifter (between off and run, it only works?) may be telling you the safety switch is the problem.

You may need to look at a wiring diagram, Greg. But the starter relay is the last component in the start circuit before the starter solenoid. From battery to ignition switch to "crank" fuse to neutral safety switch to starter relay to starter solenoid to starter-and back to battery through ground. That is the start circuit. Just that the wiring tying them all together makes it complicated.

You have a defective battery.

Yes there is a starter relay in the wiring diagram.
The yellow and lite blue wire goes from the starter solenoid to the relay. There is a yellow wire from the relay to a 30amp fuse. The key switch powers thru the neutral safety switch and then powers the relay on.

try tapping stater with hammer then try to start it if it cranks starter is bad

Pull the fuses and check the socket for power on the things that don't work. If there is no power at the fuse box there is a good change the stater igintion switch is toast. it is located on top of the steering colunm under the dash.usally less then 20 bucks All that you mentioned get power from this switch that goes to the fuse panel when you turn the key on

Sounds like the starter has failed. Have someone turn the ignition while you tap on the starter with a hammer. If it starts, that confirms starter. If it still doesn;t start, remove the stater and have it bench tested at a parts store.