4L60E Transmission Power Issue

[RTD]

Good morning all, I am working on an 02 Silverado 1500 with the 4.8L and 4L60E transmission.  I recently replaced all the fuel lines and afterwards have the following issue:

-Codes P0785 P0758 P0753 P0740 P1860 – most electrically powered solenoids/actuators in the transmission
-Check Engine Light
-Most of the instrument cluster is dead (No shift indicator, RPM, speedo, fuel, temp)
-Truck seems to start out in higher gear (can’t tell if second or third, but I believe it is only using 3 and 4).

Things I have done:
-My first thought was I damaged the transmission harness doing the fuel lines. I got under there the best I could with a flashlight but the harness doesn’t seem damaged or kinked or anything and is still in the corrugate protective sleeve.
-I tested fuse IGN0 in the dash fuse box which sends power to the trans and have battery voltage coming in and going out with the key in the on position, instrument panel is still dead though. Also pulled and inspected the fuse and it looks good, not blown.
-I did a lot of research and found a TSB (01-07-30-002D) and a few similar posts but nothing concrete. The TSB seems to point to the ignition switch, however it says if you do NOT have battery voltage at the ignition fuse (which I do) to replace the switch. It also says to ‘inspect the ignition voltage circuit between the fuse and the transmission for possible opens’. Beyond visual, does anyone know how to do this as far as voltage measuring points?

The only related wiring diagram I could find shows power coming out of the IGN0 fuse and immediately splitting to the cluster and the transmission, but it doesn't really show it routing through the ignition switch (but according to the TSB it seems like it should...)

If I’ve lost power to the transmission harness AND the cluster, then something downstream of IGN0 must be open (i.e. it shouldn’t be damage isolated to the transmission harness or the cluster would work, right?)
I can’t tell if this pink power line runs through the ignition switch next and then to the cluster and transmission, which if failed is causing the open. For information I had an issue after replacing the fuel lines where the engine wouldn’t start and was cranking it over quite a bit, not sure if excessive cranking could kill that switch. Does anyone have any experience with this or a better understanding of how power is routed downstream of that IGN0 fuse? I can’t seem to find any more wiring diagrams out there after searching for hours. I'm hesitant to spend more time and money on an ignition switch if its not the issue, both of which I don't really have much of.

Thanks