Garmin Dsc Wiring Diagram. Joined oct 18 2006. Note garmin recommends installation of the gtr 225gnc 255 by a garmin authorized installer.
2 connect the red wire to the positive battery terminal and connect the black wire to the negative battery terminal. The purpose of the nmea 0183 connection is to provide position information to the dsc emergency function of the vhf radio in the form of gps latlon from the chartplotter. Esd damage can be prevented by touching an object of the same electrical potential as the unit before handling the unit itself.
18 pin powerdata wiring harness interfacing with a variety of different equipment.
3 connect the red wire to the positive terminal on the battery or fuse block and connect the black wire to the negative terminal. Discharge esd when handling the gtr connectors fan and associated wiring. Connecting the wiring harness to power 1 route the wiring harness to the power source and to the device. Connect the thin brown wire from the vhf nmea dsc output negative to the black wire coming from the chartplotter in addition to being the power negative this is the nmea 0183 negative.