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Garmin to i50 Interface

The Garmin FMI interface is supported on selected NUVI navigation units. Refer to this page for a complete list. You will also require a sepecial data cable, which is listed on the above website.

To connect to the i50, you will need to attach a DB-9 connector to the loose cable ends, as follows:

If you are using COM1 on back of i50B, use a male DB-9 connector:

  • Black wire to Pin 5
  • Yellow wire to Pin 3
  • White wire to Pin 2

If you are using COM2 or COM3 on back of i50B, use a female DB-9 connector:

  • Black wire to Pin 5
  • Yellow wire to Pin 2
  • White wire to Pin 3

Due to a port sleep issue that occurs with newer Garmin units, the DB-9 connector should ideally be attached to COM1 (or COM3 if an Iridium modem is installed).