As I confirmed earlier, J18 has 5V power applied to it. However, since the jumpers J15 and J16 are missing the analog reference voltage is not present at J11 of the analog breakout board. In order to have an input voltage I applied a voltage at J11. The correct pins were confirmed with an ohmeter and the provided schematic. The voltage applied at J11 appeared at the resistors, confirming that this was correctly wired.
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