No starter operation?

Where is the PCM located? What is it? I already tested all electric outlet: cam shaft sensor, crankshaft, injectors they all have dc electricity except the idle throttle. Is it a problem?

I didn't test the PCM wiring yet a lot of wires r very dirty and not easily identified, I tested the fuses inside the car next to accelerator, just discovered them, I found a lot not working
(i had not tested them yet ). These are my findings using my light tester and putting the clip in ground:

First row (lower)of fuses
Ne (=no electric) in 31
all good except starter fuse #31

Second row
Don't find electricity in 14, 15, 16. 19, 20, 21, 22 (ne= no electric)
17, 18 test OK

Third row 3 ne
OK 4, 5, 6.7.9
8 électricity one side (lower) I had to take it off bkz roof always stays on
11 hbl (no electric).

The front light don't work same as windshield wiper.
The roof light stays on all the time had to take off fuse.

There are also a lot of relays I discovered inside can you show me a diagram where they are all located and their uses. I took them off to verify and clean legs of small one but am not sure of all positions when putting them back.
Thanks

I ordered the cluster didn't receive it yet.

Is it normal that I don't get any answer on my obd tester? As far as the cluster can you recommend me a company selling rebuild? I found a few on eBay but I don't trust them with 200 or 300 thousand miles, even though the seller telling you that they supposed to be working but for how long?

I ordered one waiting for delivery.

I put a new Mopar crankshaft sensor the mechanic took it off to verify and glued a piece of cardboard instead of the spacer and put it back. I don't know if the thickness of the spacer is important and the cardboard should be the same size. Do they sell spacers for Jeep crankshaft sensor? Where can I find them?

I put the new cluster it doesn't appear and I still don't start. However, a mechanic put a jumper between the pump relay and the positive battery the cluster reads all gauges but still does not start. He told me the immobilizer might be bad, but I took it off but still doesn't start. I looked at a video showing the car can work without it. The yellow key appears on the cluster but not the check engine. He is asking $400.00 to reprogram the immobilizer with the PCM. Could it be the problem?

I run a new test after putting the cluster here are my results P0753, shift solenoid, P1491 radiator fan P1687 instrument cluster what does that mean after I put a new one?

Yes same number of cluster (i already answered but don't see it). I tested all fuses No electricity in #3, 11, 13, 14, 15, 16, 31, find in 8 lower lights always on.

The yellow key stays on cluster. Check engine doesn't appear. I did not find codes by turning key 3 times.