The connector/pinout information may be applied to the Garmin model Foretrex 101
There is one pinout found for Garmin Foretrex 101 .
The pinout (pin-out) is a cross-reference between the contacts (pins) of an electrical connector and their functions. The pin assignment diagram is listed below. Click for details
Garmin Foretrex 101,201, Forerunner 201 to Serial DB9 cable schematic pinout