2nd Gen Non-Engine/Transmission problems with brake bleeding

[grizzly3430]

I have a 1997 2500 dodge with automatic..5.9 diesel..
With 4 wheel abs
system.

I change all brake lines got front ones bred but can't do back left tire as nothing comes out. I got right rear done.

I saw where I need drb scan tool to do job right.
My brake pedal goes all the way to floor no resistance there. What can I do? Concerned about driving it to make sudden stops to get air out of abs valves.
I keep trying to bleed brakes and keep using fluid with no leakage on floor or vehicle.

 

[BDaugherty]

I use this:
http://motiveproducts.3dcartstores.com/


The scan tool is to run the ABS pump to cycle the air out. You HAVE to bleed the air out of the lines first, then cycle the ABS, the bleed again. If you're not getting fluid from back left, fix that first. The "shade tree" fix for cycling the ABS is to get the rest of the air out first, the take it down the road at 25-30 MPH and slam the brakes hard enough to activate the ABS, the re-bleed. You may need to repeat more than once. Again, you need to fix your current problem first. Start by removing the bleeder screw completely and making sure that it's clear. A small seal pick and a little brake cleaner work well for clearing stopped up bleeder screws.

 

[grizzly3430]

I worked on bleeding brakes and got back to back axle and had to quit. I checked master cylinder and it was full. Left it for a day and came out to work on it and front part of master cylibder was empty with no leakage onto floor so I am having more problems..I am thinking maybe my master cylinder is acting up. Any ideas or suggestions?????

 

[MLee]

Fluid has to be going some place to be down in the master cylinder after sitting. Is it leaking out inside the firewall and going down under the floor mat?
If it was a wheel cylinder there would be evidence on the floor.