Unlike the Tc I can not fond the speed sensor wire for my nav in the xD.
anyone know where to find it... and even better pix?

 

Probably purple, in the harness..most likely in the blue/purpleish plug on the back of the radio.

 

a guy on here that has a wire diagram sent me this and i found it so give it a shot

However, I was looking at the wiring diagram...There are 4 connectors on the back of the radio, a 6pin, 10pin, 16pin, and 20 pin. The 20 pin has a purple wire in cavity 3 which is the speed sensor wire and does say "SPD" for speed on it.

 

Mine didn't say "SPD" on it, but it's definitely that purple wire in pin 3 - (20-pin connector) -