Before running the software, ensure you have the proper hardware interface to connect your computer to the mobile radio.
Pin 1 (Ground), Pin 2 (BUS+ / programming voltage – 5V via resistor), Pin 5 (TX Data from radio), Pin 7 (RX Data to radio). Incorrect wiring can destroy the radio’s controller. motorola gm3688 programming software download
If you are buying a used GM3688, always ask the seller: “Does it come with the original CPS and programming cable?” If not, factor an extra $250 into your budget. Before running the software, ensure you have the
: A USB-to-RJ45 (8-pin) or DB9-to-RJ45 cable. These are available at retailers like Amazon and eBay . Before running the software