87 300ZX STARTER WILL NOT ENGAUGE. I HAVE CHECKED THE CLUTCH SWITCH AND IT IS WORKING

Check for low Freon....Pressure Switch in the Acumalator is what latches the Compressor Clutch Relay ....Low side line should sweat all the way back to the compressor when full....Never apply voltage to Clutch or other components as This system is pressurized and explosion and frostbite hazard exist....Always wear safety glasses as well.........The system will have to be evacuated to change the afore mentioned pressure switch....Be careful.........

You don't need the clutch switch. You need an ignition switch. A part in the switch is stuck on the start position, even though the key moves.

You are some how putting power to the switch side of the solenoid on the fire wall. Take a test light and check the S switch side of the solenoid, it should only be hot when the key switch is turned on. It you have crossed this wire inside them you may be making this wire hot all the time. I would re check how you wired your radio.

Check your connections at starter battery and start solenoid. Your start solenoid could be bad.

Things to check are the clutch safety switch and the start relay. Use a volt/ohmmeter to interrogate the relay socket. From there, you can see if the signal is getting past the clutch switch. You can also start the car from the relay socket, if the downstream circuit is good. Make sure the car is in neutral before getting into the relay socket.

Have you tired jumping the AC compressor low pressure switch?

dealer only ,factory immobillisor

possible starter, tap on the starter solenoid then try to start, if it starts then you know for sure it's going to have to be replaced

i am not sure on this vehicle but it is usually right on the compressor..

it is your throw out bearing and the clutch should be replaced at the same time as the trowout bearing