You might have a defective Vehicle Manager.

Voltage for all lights originates at the Vehicle Manager.

You'll see it on the wiring diagram.

I may have a wiring diagram for this truck, I'll check when I get back to the house. Lost my thumb drive and hope my back up is where I left it!

Jay,

882-4 - Tail/Marker Lamp Driver Output OORL. I would check all the relays in the PDM, plastic box in front of the battery tray. Also, check your fuses, with the damaged wires may have a fuse blown. Swap relays and see if the code changes. Good Luck.

Updated info.
So I went on site and dug some more. Forward light fuse good and voltage present. I swapped the forward and reverse relays but made no difference. I pulled the rear overhead guard harness cover off and found some crushed wires. I pulled off all loom and had a look. Corrected wiring issue. Made no difference. I ran out of time but will be returning today. Next step is to see what I have at the forward relay. I'm assuming the VSM receives an input from the directional switch(this truck is fingertip control) and then provides a ground for the coil side of the relay? If this is good then I guess I'm perform continuity checks on the wiring from the distribution panel all the way to the front lights. I wish I had a wiring schematic for this truck. Makes it a bit more challenging. Anyway, hopefully someone may have some insight for me at some point today.
thanks,
Jay