GoForSmoke:
You put more than a tiny bit of -V on an Arduino pin, the pin burns up.If you're not really sure then really don't connect unless you can afford to burn up chips.
The sensor is original a VR sensor, but if the first datasheet shows it will be integrated to a digital ouput.
As I mentioned the pinout I know now is:
Black = - signal
Clear = + signal
Yellow = ground
I would first check the output with a scope, but don't really know how to connect it. This is what I suggest:
The + from a battery source to + signal
The - from a battery source to the ground
Then measure with the scope about the - and + signal wires I think.