E-brake cable attatched to caliper,then e-brake needs to be cycled to pring piston to rotors. Thats the adjuster.
E-brake with seperate shoes inside rotor hat then thats a different setup.
When bleeding,whoever is on the bleeder screw needs to open it more than just cracking it,like 1/2 turn. Slow movement of fluid will retain air in the line.
Residual valve for drums is 10 psi, disc is 3psi.
Check prop valve, it could be shuttled over. I check with key on, and if brake warning lamp is on,then it needs recentering.