Fuse Size Used by the Garmin Marine Radar Power Cable

Garmin radome radars use a 7.5A fuse in the power cable of the radar. The radome radars that use this fuse are:

• GMR 18
• GMR 18HD
• GMR 20
• GMR 21
• GMR 24
• GMR 24HD
• GMR 40
• GMR 41

Garmin open-array radars actually use two fuses. The first fuse is found in the cable that connects the radars pedestal to the voltage converter. This is a 7.5A fuse. The second fuse is found in the cable that connects the voltage converter cable to the power source of the boat. This is a 15A slow blow fuse. The open-array radars that use these fuses are:

• GMR 404
• GMR 404 xHD
• GMR 406
• GMR 406 xHD
• GMR 604 xHD
• GMR 606 xHD
• GMR 1204 xHD
• GMR 1206 xHD