Garmin 404 Installation Instructions Manual page 8

Step 
Connecting the scanner
Connect the scanner power cable (red and black) to Voltage Converter output cable (red and black) using the supplied heat-shrink crimp
connectors. DO NOT cut the scanner cable and DO NOT remove the in-line fuse located on the scanner power cable. After crimping the
connections, heat the connectors to shrink the housing for a water resistant fit.
Connect the scanner to the vessel's water ground using an 8 gauge copper cable. The scanner connection should be made on one of the four
mounting studs using a M10 nut and flat washer to secure the cable.
10.5 to 38 VDC
�
RED
Power Supply
15 amp slow-blow
BLACK
�
fuse
TO WATER GROUND
TO GARMIN MARINE NETWORK
Wiring Diagram
6
GMR 404/406 Marine Radar Installation Instructions