No fluid at rear brakes

Bench bleed the master first, do it in the car it will be less messy.
This is the best way to bleed brakes.
Start at the right rear.
Open the bleeder, have somebody press the petal slowly, hold the petal to the floor.
Close the bleeder.
Repeat until fluid comes out with no bubbles.
Go to the left rear, do the same thing.
Right front next, then left front.
Repeat and you will have good brakes.
Whatever you do never pump the petal all you do is put more air in the system.
You need to push the fluid thru the lines, pumping just will add more air.