01 volvo vnl 770 n14 low beam/high beam wiring issue / hazard light

Hey guys
I recently got this truck and im having light issues
I keep blowing the f18 30amp (driver side light fuse) fuse when i turn the high beam on
I know continuity is good in the engine bay, it is definitely under the dash
I just thought i ask a question here before i pull the dash out .
It had some bad relays and it used to have a qualcom or whatever im removing all its wires slowly.

I also have no 4 way hazard light on the back of the bobtail everywhere else is fine , turn signals are working properly.
I got a spare hazard and high beam switch from the junk yard that didnt fixed the problem.
Thank you!

 

thank you i'll check it
do you know where you can get a factory service manual for these trucks?
i could really use a wiring diagram

 

not really i've made it work temporarily but i wanna make it back to factory
please update me if you find out something