W123 ignition problems

Iso.sau.si

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W123 1984 300td
Hey there! So ignition problems, wouldn't start when I try to crank it with the key. It will start when I go to the terminal box and connect the two terminals with a wrench tho.
I replaced the ignition switch and it didn't fix it. I don't see any fuses in the fuse box for anything about ignition, but the paper is all worn out so maybe I missed one?

The starter seems to be fine because it starts and it's pretty new. I'm pretty sure it's not the NSS.
So before I throw in a push button starter
Is there anything else I may have missed? I really would like the key to work still. But if it can't then whatever.

Does anyone have an electrical diagram for the ignition and starter ?? Thanks for you help.
 

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Check the inhibitor switch, it may think it’s in gear. do your reverse lights work as this is a simple test for it.
 
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Iso.sau.si

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Check the inhibitor switch, it may think it’s in gear. do your reverse lights work as this is a simple test for it.
My reverse lights never worked. As the there's a cable under the car That connects neutral safty switch to the back of the car, at least that's what's been to to me. We've dealt with it for the past few years and we just don't have reverse lights. So I can't test it this way. But Im Curious about this inhibitor switch. Lease tell me more.
 

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Bolted to side of gearbox behind selector lever, stops you starting it in gear.
 

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