Why is there two styles of obd reader cords? Is it only for the ones that don't have the usb ports so they use the serial ports? Are the usb for use with computers without serial ports? Is there a difference in the capability of one over the other? I figured out what I did wrong with mine, I'm really embarrassed about it but I ordered the obd1 cord with the bare wires on the end, and I don't know what I was thinking but I had the wired taped into the serial port. Yea I know I'm a dumbas, but I guess I know now why I wasn't getting anything from the vehicles. In hind sight I guess I'm glad I didn't get any data either, hopefully it's a sign that I didn't mess anything up. I should have connected the dots when you guys were telling me to make sure I had the correct usb port for the obd cable in the 'my computer' section. At least its never boring around here!!! Thanks for your continuing support and bearing with my idiototic actions.