Isx15 primer pump not running

Hi guys,
I am working on my 2012 kenworth t800 and lift/primer pump is not turning on. I checked relay (by swapping with working t800) and no go. Next I was trying to find the fuse for primer pump and can't find it anywhere on the driver side. My battery box doesn't have it either. I pulled the plug for primer pump and checked voltage with ignition on and nothing.
Something to mention, I have codes for boost pressure, water in fuel and egr/scr service required. Not sure if these are related.
Can someone point in right direction where to find this primer pump fuse or do I even have it?
I inherited this truck as part of the deal and it wasn't running, so trying to get it running. I am getting a strong crank, just can't get primer pump to turn on.

 

This might help as additional info:
- SN:954243
- Isx15 CM2250
-18 speed manual
-tri-drive extended day cab
-Emmisions not deleted
-Battery compartment is between the rails behind the cab

 

No worries. I looked everywhere for this fuse and it doesn't exist, which baffled me.
For the future, this priming pump is a part of emmisions control circuit. There is a regen button in the cab which I had on off. When I switched the button to middle position (but not to initiate regen) it activated the priming pump.
I started the truck no issues after the simple button switch.
Thanks to everyone who replied and hopefully this will help someone else.