Quote Originally Posted by MSHardeman View Post
Well I'll be. I had no idea a proportioning valve could do that. I just thought it regulated the amount of pressure going fore and aft, not that it would allow the front or rear to work if the other went out. Maybe I'll have to disconnect some of my brake lines to see if mine works or not. Since I don't have an idiot light for my brakes showing on my dash I guess it is working.

I suppose the line could have had a flaw in it to begin with, but I can't imagine the amount of pressure that would be required to blow out the inner rubber lining AND the braided stainless. Impressive.
I think my proportioning valve may be bad, or I have a huge clog somewhere between the front and rear, or I suppose it could be in the ABS garbage somewhere.
I may put a bolt in the front proportioning line tomorrow and see if I magically get rear brakes, if not, I will get the valve off the junk VX here in town. Probably a good time for me to remove all the ABS junk and hardline from the proportioning valve to the calipers.