2001 Peterbilt 379 ac help please

I don’t hear any sounds when jumping those pins

 

No sound from compressor when jumping those two

 

No voltage at the compressor with it being jumped and it takes a bit of strength to spin it

 

Learned a lot during this process. It all makes a lot more sense now. Thank you all for the help. After getting a test light and doing some more testing I found out the ac comp relay wasn’t getting a ground. After tracing all the wires and trying a couple things, it wound up being the low pressure switch is bad.

resolved this issue and was excited. Just to be completely disapointed, turns out the ac compressor is bad. At least I’m assuming. It’s hard to turn by hand, the pulley spins no problem and isn’t binding the belt. I had done an ohm check on the compressor and it was fine. But the first time I gave it power it blew the fuse instantly. Tried a couple things and no matter what as soon as I hit the ac switch the associated fuse blows.