https://www.torproject.org/docs/debian

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I'm new here, so please excuse me if this is all wrong. But reading the above posts tells me that you apply 3V3 and then the ground side is connected to a GPIO pin that is "set low" to supply ground when the LED is being lit. It doesn't sound as though you are wiring it correctly. If you are using a...

That third prong is for protective earth ground. It is used on AC powered devices to keep you safe if the case of the device gets shorted to power, you don't. On an AC to DC adapter, the output side is isolated from the AC input by a transformer. So there is no need to do the third prong. The 5V in ...

I haven't checked yet, but you also need to make sure the GPIO pins can supply enough current to run the fan. Sorry, forgot to point that out in the last post.

The problem is most likely that you are trying to run them in series. The LED has a large forward voltage drop. When it does this, the fan no longer gets the full 5V. You don't necessarily need to use two pins, (but why not) but you do need to run a separate wire from the 5V pin to each device. Look...