I have replaced the main relay even though the fuel pump kicks on. It won’t crank or start with the key, so I replaced the ignition switch, but it still won’t crank. I can turn the key to on, and jump the solinoid on starter and it will crank, fire, and run fine. Just can’t start with key. Does anyone have an idea what it might be? Btw it was working fine but the car has set for a while.

 

check for voltage at the signal wire at the starter when turning the key to "start"

 

 

What is battery voltage? Under 12.xx and it is going to crank slow. Less voltage will crank less. Might just make a tick from the solenoid click.

Did any of these happen first?
You replaced the cylinder lets omit that.

With a charged battery 12.68+.

Wiggle test , remove the lower dash kick exposing the harnesses going to the column above your legs, while turning the key multiple times, wiggle the different lengths of wire , eventually you you will hit the one with poor connections and she will light up. Try it...Those old ignition harnesses can be particular about how they lay , and fail if they are disturbed, by a replaced "what have you".

 

is it safe to assume you have had the battery charged ? see if it push starts

 

 

No nO no. Back track throught the harness. Use ohms and keep one end anchored to the DVOM lead. Find where the break is. There wont be ohms anymore it will say OFL.

Follow the wiring diagram in your manual when you get lost at the bulkhead. Manual will give you wire color codes.