Will not start unless pop it

1990 NISSAN HARDBODY
216,000 MILES • 4 CYL • 2WD • MANUAL
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JAMESALLEN
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The engine turns over but will not start using key, however it will start and run fine if I pop start it using transmission to start it. Please help. No one I know can figure it out.
Dec 16, 2018 at 9:48 AM
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DANNY L
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Hello, I am Danny.

Have you looked into the clutch interlock system? I would start there first.Basically it is an electrical circuit and switch so you can only start the truck with the clutch pedal depressed. I have attached a picture.Hope this helps and thanks for using 2CarPros.
Danny-
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Dec 16, 2018 at 1:24 PM
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JAMESALLEN
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Danny, thank you very much for your reply. Yes, I checked it. Good thinking though. The only reason I thought about it was I had a Toyota that had that problem. Been messing with it and just figured out that it's in the ignition.
Dec 16, 2018 at 2:02 PM
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DANNY L
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Hello again.

Okay, Keep us updated. I can look for a steering column/ignition switch if needed. Hope this helps and thanks again for using 2CarPros.
Danny-
Dec 16, 2018 at 2:31 PM
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JAMESALLEN
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Thank you very much.
Dec 16, 2018 at 8:00 PM
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DANNY L
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You're welcome!

I've attached a wiring diagram for your trucks starting system. I've also attached a tutorial showing how to test wiring.

https://www.2carpros.com/articles/how-to-check-wiring

Hope this helps and thanks again for using 2CarPros.
Danny-
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Dec 17, 2018 at 12:37 AM
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JAMESALLEN
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Excellent! Thank you.
Dec 17, 2018 at 8:05 PM
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DANNY L
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You're welcome!
Feel free to ask any other questions and keep us updated.
Thanks again for using 2CarPros.
Danny-
Dec 17, 2018 at 10:38 PM