1980 K10 Wont Crank

[Hevychev76]

just an idea here but seems to me that your issue is on the column than under the hood, I would check out the neutral safety switch at the base of the column, its what that purple wire that goes to the s terminal on your starter is connected to, try putting a test light on that purple wire at the base of the steering column and turning the key at the same time if it does not illuminate then your NSS needs attention, also have you tried moving your gear selector to different positions while trying to crank it

[Irish_Alley]

it should be with the ignition switch since its not powering the radio or wipers since they only get power with "key on" or acc either its not getting power ot its not sending it out. if i understand it right

[VileZambonie]

After you repair your fusible links, check your connection at the ignition switch. Also can you feel the appropriate modes of operation when actuating the ignition lock cylinder? Does it spring back from the crank position and feel tight?

[RustyChevrolet]

I did try cranking it after smashing it into park as well as neutral. I also bought a new ignition switch since it was only $13, even though I could hear it actuating.  Unfortunately after installing the new one it still will not crank. I still have my last fusible link to install because it runs into the junction box I have pictured a few posts ago and can not find a replacement part. I will fabricate one tomorrow. I included the picture of the starter wiring as asked. Narrowing it down I suppose.

[VileZambonie]

Is that wire touching your exhaust?

[Irish_Alley]

where do those two wire run to? i cant remember where or how many wires i have on my starter, cause it never has giving me a problem.

[RustyChevrolet]

Finally have got enough warm weather and time to work again.   I still do not have power to S terminal on starter solenoid or to purple wire running into the cab. All fusible links have been replaced and read 12.4v just like the battery. Ignition switch has been replaced , I feel like all that can be left is cylinder key lock. Is that even an option?     

[RustyChevrolet]

Irish_Alley
one runs to a black junction on the firewall(pictured a few posts back) where it diverges three ways(alternator, into the cab and to a box on the AC unit. The other runs to the alternator.

[VileZambonie]

Still not running? Move that wire touching the exhaust manifold before you do anything else. Use a test light to check the connection at the park neutral switch if everything else is working. All fusible links are in tact, radio, interior lights etc all working, then with it in Park disconnect the P/N switch and jump it. See if it starts if it does, replace the P/N switch.

[RustyChevrolet]

Nope not yet.  Radio, wipers and heat all still do not work.  But interior and headlights work.  Still no power at P/N switch. I did jump it and engaged the starter as you suggested. So I guess it is off to get a P/N switch.