Wabco air compressor not building pressure kenworth t660

So I'm cruising right along down 75 in Atlanta right before 285 and I look down to red air lights.. pull over check everything I can drain the tanks replace the filter pull the air line from the compressor to the filter housing and it doesn't push my finger away but it's pushing a LIIIITTTTLEEEE but of air enough to blow out a candle.. I unhooked the output line from the compressor head and same thing liiiiittttleeeee bit of air so I'm thinking ill buy the wabco air compressor head repair kit if I can find it because I have no oil coming from the compressor at all.

What do you think? Please serious replies I got towed to a petro in Atlanta and currently sitting here ..

2012 kw t660 paccar mx-13
Wabco 1805490 pex
Head kit on wabco website is;

https://www.wabco-customercentre.com/catalog/en_US/9125189222?cclcl=en_US

I'm going to replace the head "if I can get my hands on one" in frame much easier than pulling the fuel pump and power steering pump just to get to the air compressor

 

That's kinda what I was thinking but the fact that I pulled the main air out line on the compressor and it has minimal output makes me feel like it's in the compressor I don't know everything about the system but I'm learning alot today lol
Is the governor electrical or air pressure driven? And is it on the water separator module?

 

I tried tapping on the head with a hammer that didn't work I feel like it may be that but I had a bit of ice built up from being in cold weather in the tanks it was like yellowish and thick but not so much to stop the brakes from working I kinda feel like the head flapper layer or the check valves in the head may be messed up .. it's number 13 on the website diagram if you look at it it's under the service parts where it says show more or something like that

 

Would water or ice cause that to stick even If the tanks are drained and I changed the filter? I'm guessing that is possible .. is there a way to bypass that to check and see if it will start to build?

 

Just pulled that there is still water coming out