Before replacing the PCM we need to verify we have good power and grounds to it.
I usually use a sealed beam headlight to check this, that way it will tell if we have a bad circuit by load testing it. If you don't have one just use a test light for now.
Here are the wires you need to check. Use a paper clip to go inside the terminals so you don't spread them with your light probe!
1-Turn the key on and test the pink/gray wire C1 connector on PCM which should be a gray/black connector. The wire is in terminal 20. There should be power.
2-have someone hold the key in the start position while you test terminal #38 yellow wire in the same connector. It should have power in the crank position.
3-Now move to the C2 connector(gray). Test terminal #46 orange/red wire. It should have battery power at all times.
4-Now we need to check the grounds. Hook your light lead to the positive battery post and probe terminal #10 black/brown wire in the C1 connector. The light should come on.
Then move to the C2 connector and test terminal 50 black/dark green wire. the light should come on.
Let me know how this goes! Thanks!