Hi,

I really appreciate all your help here! So do you think that this http://www.scantool.net/products/pro...products_id=12 will allow me to Rx and Tx to the data wire?

And then can I use the serial data gathered in this way to program a PIC to send the serial data onto the data wire based on input events I choose ?

As for what voltage is on the data wire, I'm not sure, I used a LED with a 1k res inline and it would flash when data was sent. I also used a 4n25 opto to isolate the laptop but this would not work even though the opto was definatley working correctly, so I then connected direct from the data wire to the RX input on the db9 and that's when I got the (ASCII ???).

Thank you very much.