
6 GHP 20 Installation Instructions
Refer to this diagram for component-interconnection reference only. Follow the detailed installation instructions for each component starting on
page 7.
➊
➋
➌
➍
➎
➐
➏
➊
GHC 20
➋
NMEA 2000 network The GHC 20 and the CCU must be connected to the NMEA 2000 network using the included T-connectors
(page 8).
If there is not an existing NMEA 2000 network on your boat, you can build one using the supplied cables and
connectors (page 10).
➌
NMEA 2000 power cable This cable should be installed only if you are building a NMEA 2000 network. Do not install this cable if there is an
existing NMEA 2000 network on your boat (page 10).
The NMEA 2000 power cable must be connected to a 9–16 Vdc power source.
➍
CCU Mount the CCU with the cables pointing straight down (page 7).
➎
Steering controller cable
➏
Steering system access The steering system access may look like a NMEA 2000 network, but the steering controller cable can only be
connected to the steering system access, and not the NMEA 2000 network (page 7). The connection varies based
on the steering controller manufacturer. See the steering controller documentation or www.garmin.com for more
information.
➐
Alarm Wire the steering controller cable to the alarm (page 7).
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