I've got an 06 Cadillac STS that came from up North and had rusted out brake lines and sat for a bit with no fluid. Replaced all the lines with some from a salvage yard, including two from the master cyl to abs module. 

Went to bleed and I get fluid steady from one circuit of the LF and RR, but I get no fluid coming out from the LR and RF wheels. RF wheel had caliper replaced. 

I have the car up on stands, so not all electrical connectors are plugged in as bumper and some stuff came off. Used Autel Maxi AP200C tool to try and auto bleed to force air out of ABS, but when running it, it was going through the sequence, but I heard absolutely zero sound from the ABS module when it was going through each wheel. I don't have a pressure bleeder, but felt it still should have opened some valves in the abs. 

This car has consumed so much time, money, and energy and I kind of wish I just parted it out like I originally thought about. 

Where do I go from here? It seems like maybe one circuit got closed off when the prior owner had his leak occur to keep fluid in the good side. Is this possible? Like do I need to simulate a pressure loss in the side that gets fluid to get something to reset? Or could this just be some huge air pocket in the ABS for the LR RF circuit?