How do you bleed air out of proportioning valve on a 1991 toyota 4 runner. I cha on 1996 Toyota 4Runner

I changed rusted out brake line, bled 4 wheels can't get fluid out of rear bleedes

Asked by for the 1996 Toyota 4Runner
Move the valve on the rear by hand while helper pumps brakes. Load sensing proportion valve i think it is called. Also be sure bleeder screws are not stopped up.
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get a shop to pwr bleed system for u