05 western star gauges schematic

Have an o5 doing some strange gauge stuff. Anyone have electrical schematics so I know what to look for. What I have so far is this:

Gauges do not sweep when you switch the key on. Warning lights do not flash when you turn the key on. Gauges do work with power applied.

Driver information warning lights beep anytime power is applied but none of them work or light up. The only way to apply power to the gauges is to either turn on the headlights or open the driver door.

I have a volt ohm meter, freightliner software, and an oscilloscope. Knowing what pins/wires are supposed to do what would help a lot.

Vin# pw78991

Found the engine ground to the frame disconnected and arcing so cleaned and reattached that but no change. Also pulling the marker light fuse kills power to the gauges.

 

Update for anyone needing info.

 

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I numbered them before I had a schematic. Now I have another photo and have relabeled them but didn't post it yet

 

Spl 4-0 is my problem area.

 

Larger photo

 

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Data star corrections. Pin 1 & 6 should have ignition power from spl-20 fed by fuse f-20. I'll check the fuse in the morning.