2012 W900 left brake light

[Truckdriven]

(10-31-2022 )Mikanic Wrote:  You have 2 power pins at connector A (black), 4 power pins at connector B (white) and 2 power pins at connector C (blue). I dont remember the exact pins. You should get a fault from chassis node if your missing power but to know which power circuit you would have to check faults with ESA.
I hope you started your diagnosis by checking the fuses under the hood.

Yes I checked the fuses under the hood and actually back probed each wire after the fuse to ensure the fuses were making proper contact. I have the pinouts of the plugs so I will be able to find the power wires at the node but hadn't studied it enough to know exactly how many wires are in each plug so thanks for that. It will go a few days till my driver gets back to the shop before I can test it farther.