Stupid brakes..

[sreidmx]

So I am working on this K20 for a buddy, and I cannot seem to get the prop valve to reset, I pushed in the button and bled the front and rears but it always seems to move back to the rear so much now the truck is dangerous on the street.. Its not loosing fluid anywhere so that's good.
Any way to fix this or maybe there is a sequence I am out of order on??
We are also swapping to discs in the rear soon so I am not sure its a huge deal.
Wildwood combo valves are looking mighty attractive considering I can adjust the bias manually.

 

[dyeager535]

So I am working on this K20 for a buddy, and I cannot seem to get the prop valve to reset, I pushed in the button and bled the front and rears but it always seems to move back to the rear so much now the truck is dangerous on the street.. Its not loosing fluid anywhere so that's good.
Any way to fix this or maybe there is a sequence I am out of order on??
We are also swapping to discs in the rear soon so I am not sure its a huge deal.
Wildwood combo valves are looking mighty attractive considering I can adjust the bias manually.

The valve can't move without a pressure differential...something is wrong on the bleeding side if it's not staying in place. I assume it triggers the brake light?

Only "leak down" that can occur which affects pressure is in the master. When my master failed it triggered the brake light, and since I lost brakes, assume that triggering was caused by fluid allowed to flow back into the master, past the piston seals.

I've seen the new to me proportioning valves that are out there that are almost full function so that you could completely replace the factory one. Not happy they did not include the warning light, which makes me wonder if they also don't save your tail if a line breaks as the actual valve is gone?