The connector/pinout information may be applied to the Garmin model GPSMAP 278
There is one pinout found for Garmin GPSMAP 278 .
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 GPSMAP power and data cable pinoutUsed by GPSMAP® 276C, GPSMAP® 278, GPSMAP® 296, GPSMAP® 376C, GPSMAP® 378, GPSMAP® 396, GPSMAP® 478, GPSMAP® 495, GPSMAP® 496