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Can't tell what you're trying to do from that picture. Perhaps you could give a model number or a picture of the wiring instructions from the manual, and also tell what you are trying to do.
The yellow wire is the "speed sensor" wire. Every time a fan (3 wire, red/black/yellow) rotates it sends a signal through the yellow wire. The fan controller counts those signals (one signal per revolution) to determine how fast the fan is going.
Originally Posted by Nick911  Is the yellow wire what controls the voltage? |
The yellow wire is the "speed sensor" wire. Every time a fan (3 wire, red/black/yellow) rotates it sends a signal through the yellow wire. The fan controller counts those signals (one signal per revolution) to determine how fast the fan is going.
