Found my answer to sinking the incoming LED.

Do I set it as an output then set it's low state?
Quote Originally Posted by mackrackit View Post
YUP.

Think of it like this. LED connected anode to positive rail. To make it light with the cathode connected to a PIC pin you would output LOW. (LED has a drop down resistor)
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http://www.picbasic.co.uk/forum/showthread.php?t=7638


PIN --- DUAL LEDs --- RESISTOR --- PIN

Is it a simple matter of leaving both pins output LOW? That would mean both are connected to ground; no chance of leaking current.

Robert