side note- some of those modules have gone bad due to moisture accumulating in that area. May have had some blockage in the passenger footwell at some point. If that area does get wet (even moisture), it will corrode and kill the little capacitors inside. Someone here was able to rebuild those...
Unlocked trucks don’t have that locker module
I’d test to see if you are getting power out of that locker ecu module. If you are then you prob have a wire cut somewhere under the truck or along the driver side main harness
Oh yea, if that locker ecu is toast, you will have to rebuild it...