The connector/pinout information may be applied to the Garmin model GPSMap 78s
There are 2 pinouts found for Garmin GPSMap 78s .
The pinout (pin-out) is a cross-references between the contacts (pins) of an electrical connector and their functions. The pin outs diagrams are listed below. Click for details
Garmin GPS 45, 12 XL, GPS II, III, V, 72, 76, 92, 176, 176c, 196, 295, StreetPilot III (round connector) pinout