Step 3: Wire things up
I hooked up the serial interface cable to the GPS, next, I googled for the pin diagram.
It shows serial communication from pin 2 or 3 and the ground on pin 5.
I fire up the radio and the GPS.
I just stick the bare ground in the number 5 hole in the serial connector, and the other wire in the pin 2, nothing happens. Move it to pin three, a few seconds later, life. Woohoo.