When you turn the key the only thing that comes on is the check engine light?

When you open the door there is no chime, when you turn the key the only thing that comes on is the check engine light. You can hear a click on the top of the motor, like a pump priming. I changed the ignition, I have had trouble with it before. But that didn't fix it. BCM? Also, I had my windshield replaced and it leaks pretty bad, would that help fail the BCM? The truck was running and driving, shut it down to change transmission lines. And the truck sat for 6 months with the windshield leaking. I tried to shop vac it out and put a dehumidifier in my truck. No codes from obd2.

I have also taken out the bcm and inspected it, clean and nothing looked burnt or discolored. Hooked up the battery and tried the key and just the check engine light nothing else. No turn or start. Disconnected the wiring harness right below the bcm, (i think it runs to the back of the truck running along the running panel), and when I tried the key again there was no check engine light or anything else?

Any help will be much appreciated.

Thank you.