If you mean two wires as in two seperate conductors, then this should be
easy.

Since your receiver only has two conductors going to it, it has to be
passive. As you can't apply ground and vcc, and has a data line with
only two wires.

This means most likely it's just a IR phototransistor.  Also since the
transmitter only has two wires it's most likely just a IR LED being
turned off and on.

Most likely the controller board modulates the IR BEAM to block out
ambient light.

So to make a long story short it looks like what you got here is a long
range optocoupler.  :)  So to override the safety function (I take no
responsibilty for personal injury or your poor door :) )  hook up the
phototransistor side of an optocoupler to the reciever lines and the IR
transmitter lines to the diode side of the optocoupler.  Check to see if
the transmitter and reciever "remaining bits" have a resistor in them to
make sure you don't blow the optocoupler.

BTW, hooking up the diode or transistor backwards shouldn't hurt the
optocoupler but of course it won't fuction.  Just try the four
orientations till it works, oh yeah it'll be the last one you try.  :)

I could be wrong, but I think I'm right and if not I'm sure I'll be
corrected.  :)

Aaron

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