No brake fluid is getting to my rear drum brakes.

dodgemahal said
The switch closes the circuit and illuminates the brake lamp on the dash, per Cudamark, indicating the circuit has continuity. My test shows that the spool has not moved, closing said circuit. Correct?? This still doesn't get me any closer as to why there's no fluid getting to the rear wheel cylinders.
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You'll just have work from where you have fluid flow to where you don't. Crack the line at the master cylinder and see of it pumps out there. Then try the output side of the proportioning valve. If it flows into the valve, but, not out, there's a blockage in the valve.