AC and Fuse Problems

Replaced my compressor with a non Toyota part and it stopped working for me a couple thousand miles later. It blew a 10amp fuse and the dealership wasn’t exactly helpful with figuring out the issue. This was September 2023.
Fast forward to now (May 2025) and I’m getting the truck ready to drive cross country again.
The blower works, but when I turn on the AC the AC clutch does not engage. Because the clutch doesn’t engage I don’t know if the compressor works at all.
Is it possible I have low refrigerant due to no use for 1.5 years? Would that disallow the clutch to work and prevent the compressor from working?
Additionally, why in tarnation did a 10 amp fuse blow back in 2023? It wasn’t the only time it did that, it happened any other time I tried to turn on the AC to defog my windows and I’d end up replacing the fuse every time. Eventually I ran out of fuses over a year ago and simply stopped turning on the AC, let alone the fan.

was looking into replacing the clutch and compressor but I just don’t know if that would fix the issue. And of course I’d still have the riddle of the 10 amp fuse. HELP!

 

Seems to me you likely have 2 issues.

Refrigerant has leaked out thus the compressor not turning on, would need to hook up gauges to confirm this.

A short in the wiring going to the compressor clutch or the clutch itself is shorted which would explain the blown fuse when you turn the A/C on (I'm assuming it's the IG1 No 2 Fuse that's blowing).

 

Here’s the update. I believe the levels are equal because the AC clutch hasn’t been engaged in a long time, disallowing the high pressure to be at its normal level. We also found a wire that evidently got sucked into the clutch and cut. Assuming this is what blew fuses due to it being a short until it was cut entirely. It also obviously is preventing the clutch from receiving any electrical charge and keeping it from engaging.
How’s my theory sound?

 

Pressures are always gona be near equal when the compressor isn't running so those look normal and the refrigerant hasn't leaked out.

The wire rubbing is almost certainly why you were blowing fuses.

Now to figure out why the A/C isn't turning on, you didn't happen to remove the MG CLT relay when the fuses were blowing did you?

 

No, I did not remove the relay. The current plan is to replace that wiring and see if that does the trick. If not, then we will go to the relay.