I am attempting to bleed the brakes. I have the quatro amigo lights going and and fixing to have the codes run again. I have done the Option B process. Cleared codes and they stayed off for a little more than a day.
My problem is that when jumping the ABS relay, the RF and LR brakes bleed just fine. The LF and the RR do not pressure up. Same thing when you perform a pedal bleed as well. The lines a clear. I blew them out, but they still fail to pressure up.
What could be causing this?
I will update with codes shortly.
I order a code reader so I won't have to keep running down to the mechanic.

 

Here are the ABS codes from a Snap-on scanner
9-ECU Ground or Reference Ground Fault
72-Shuttle Valve Switch Long Term Failure
76-ECU Ground or Reference Ground Fault
87-Pump Relay (Open Circuit)
112-Rear Right Outlet Valve (Internal Supply)

Also showing code P0455 Evaporative Emission System Leak Detected (gross leak / no flow)

Any ideas ideas are appreciated.

 

Did you clear the codes after Option B? Did you re-use your original Shuttle Valve Switches? Did you leave the OEM black plug on the Shuttle Valve Switches or did you cut it out of the loop and connect it to the 2 wire trailer harness?

 

I did clear all codes, they stayed clear for about 3 days. I did re-use the original shuttle valve. I cut the OEM black lug out.