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Spaghetti,
Great post, I just installed the DIF Fan Controller and had the same confusion on the wire colors. It's because there are two places you can tap the wires, the Sensor Side (Black, White, Red) or after the connection point (Blue/Orange, Black, Blue/Black).
Sensor Side
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|+Black | -White | Red |
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----(This is a connection point, note the wires change colors.)--------------
After the connection point
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|+Blu/Or | -Blk | Blu/Blk |
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(*Note Blue/Orange wire sometimes looks like Blue/Brown)
So from the DIF Unit the:
+White wire taps either +Black (Sensor Side) or +Blue/Or (After connection point).
-Gray wire taps either -White (Sensor Side) or the -Black (After connection point.)
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