Chassis node power input

[alborz]

   

(09-26-2020 )alborz Wrote:  I get these two masseges on dash
chassis node power input, check fuse
fault code: 5127
primary fog lamps fault
fault code: 2388

I checked all fuses in engine compartment and inside the cap. all good and have power.
The chassis code on and off appears on the dash, but the primary fog code is constant. No power at the bulb lights and they'er good.
2015 Peterbilt 579
Any input will be appreciated.

Problem solved
Thank you everyone for your input.
I share my findings, incase, incase might be helpful to somebody in this forum and save them money.
in my case, after some research I found all the exterior lights end up in the fuse box under the hood and from there it go to that damn chassis node box which is under the cab, exactly under driver side above air tanks. Peterbilt 579.

I found although if the fuse is good there might be a break on a wire between fuse box and the node and you need to check the wire harness visually to find the break. I was lucky that the break was on a wire right on the B- plug going to node.