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12 

GHP 12 Installation Instructions

13. Snap the mounting covers 

 into place.

Connecting the GHC 10

For the autopilot system to function correctly, you must connect two 

wires from the GHC 10 data cable (yellow and black).
1.  Connect the yellow wire from the GHC 10 data cable to the yellow 

wire from the CCU/ECU interconnect cable.

  If the cable is not long enough, extend the yellow wire with 22 

AWG (.33 mm

2

) wire.

2.  Connect the black wire from the GHC 10 data cable to the same 

ground location as the ECU.

  If the cable is not long enough, extend the black wire with 22 AWG 

(.33 mm

2

) wire.

3.  Solder and cover all bare-wire connections.

Multiple GHC 10 Considerations

You can install multiple GHC 10 devices (sold separately) to control the 

autopilot from different locations on the boat.
•  All additional GHC 10 devices must be at software version 3.0 or 

later.

•  All additional GHC 10 devices must be connected to the 

NMEA 2000 network (

page 12

).

•  To use an additional GHC 10 to turn on the autopilot, connect the 

yellow and black wires from the additional GHC 10 to the same 

wires as the primary GHC 10.

 ◦ If you connect additional GHC 10 devices to turn on the 

autopilot, you must turn them all off to turn off the autopilot.

 ◦ If you do not connect an additional GHC 10 to turn on the 

autopilot, then the additional GHC 10 will enter standby mode 

when you turn it off, and the autopilot will remain on until 

turned off by the primary GHC 10.

Connecting the Devices to a nMEa 2000 

network

Notice

If you have an existing NMEA 2000 network on your boat, it should 

already be connected to power. Do not connect the included NMEA 

2000 power cable to an existing NMEA 2000 network, because only 

one power source should be connected to a NMEA 2000 network.
You can connect the GHC 10 to the CCU through an existing NMEA 

2000 network. If you do not have an existing NMEA 2000 network on 

your boat, all the parts needed to build one are supplied in the GHP 12 

package (

page 13

).

Optionally, you can connect NMEA 2000-compatible devices, such as 

a wind sensor, a water-speed sensor, or a GPS device, to your NMEA 

2000 network to use the advanced features of the GHP 12.
For more information on NMEA 2000, go to 

www.garmin.com

.

Connecting the GHC 10 to an Existing nMEa 2000 network

1.  Determine where to connect the GHC 10 

 to your existing NMEA 

2000 backbone 

.

2.  Disconnect one side of a NMEA 2000 T-connector from the 

network.

3.  If necessary, to extend the NMEA 2000 network backbone, connect 

a NMEA 2000 backbone extension cable (not included) to the side 

of the disconnected T-connector.

4.  Add the included T-connector 

➌ 

for the GHC 10 to the NMEA 

2000 backbone by connecting it to the side of the disconnected 

T-connector or backbone extension cable.

5.  Route the included drop cable 

 to the bottom of the T-connector 

added in step 4, and connect it to the T-connector.

  If the included drop cable is not long enough, you can use a drop 

cable up to 20 ft. (6 m) long (not included). 

6.  Connect the drop cable to the to the GHC 10.
7.  Connect the drop cable to the T-connector you added in step 3, and 

to the GHC 10.

 

NOTE:

 In order for the autopilot to turn on, the yellow wire from 

the GHC 10 data cable be connected to the yellow wire from the 

CCU/ECU Interconnect cable, and the black wire from the GHC 10 

data cable must be connected to the same ground as the ECU 

(

page 12

).

Summary of Contents for GHP 12 Autopilot System

Page 1: ...n each component Contacting Garmin Product Support Go to www garmin com support and click Contact Support for in country support information In the USA call 913 397 8200 or 800 800 1020 In the UK call...

Page 2: ...rations 14 Connecting an Optional NMEA 0183 compatible Device to the GHC 10 14 Shadow Drive Installation 14 Connecting the Shadow Drive to the Hydraulics 14 Connecting the Shadow Drive 14 Configuring...

Page 3: ...to the drive unit The ECU controls the drive unit based on information from the CCU The ECU powers both the CCU and the drive unit Serial Number GHC 10 The GHC 10 is the primary interface used to oper...

Page 4: ...e NMEA 2000 network Either connect the CCU and the GHC 10 to an existing NMEA 2000 network using the included T connectors and drop cables use all of the included NMEA 2000 cables and connectors to bu...

Page 5: ...n the location you want to mount the CCU then there is magnetic interference Choose another location and test again The CCU can be mounted below the waterline if it is not in a location where it will...

Page 6: ...fitting at the helm and the Shadow Drive Do not install the Shadow Drive directly to a hydraulic T connector in the hydraulic line Install a length of hose between a T connector and the Shadow Drive...

Page 7: ...ctors page 12 If there is not an existing NMEA 2000 network on your boat you can build one using the supplied cables and connectors page 13 Drive unit The drive unit must be installed by an experience...

Page 8: ...Vdc battery The ECU can connect to a 12 24 Vdc power source The NMEA 2000 power cable must be connected to a 9 16 Vdc power source CCU The CCU must be installed in the front half of the boat no highe...

Page 9: ...he GHP 12 rudder feedback cable not included to your drive unit based on the wire colors and functions defined below Wire Color Function Red Feedback positive Black Feedback negative Yellow Feedback w...

Page 10: ...power cable to a terminal block or other source connect it through a 40 A fuse If you plan to route the ECU through a breaker or a switch near the helm consider using an appropriately sized relay and...

Page 11: ...8 F from 15 C to 70 C Extended exposure to temperatures outside of this range in storage or operating conditions may cause failure of the LCD screen or other components This type of failure and relate...

Page 12: ...d to power Do not connect the included NMEA 2000 power cable to an existing NMEA 2000 network because only one power source should be connected to a NMEA 2000 network You can connect the GHC 10 to the...

Page 13: ...CU Building a Basic NMEA 2000 Network for the GHC 10 and the CCU Notice You must connect the included NMEA 2000 power cable to the boat ignition switch or through another in line switch The GHC 10 wil...

Page 14: ...lor Function Black CCU signal ground Yellow CCU signal Blue Tx A White Tx B Brown Rx A Green Rx B Three examples of various wiring situations are provided in the appendix page 21 3 If necessary use 22...

Page 15: ...rrect drive unit voltage value for your non Garmin drive unit can damage your drive unit NOTE This setting applies only to non Garmin other drive units 1 Consult the manufacturer of your non Garmin dr...

Page 16: ...select the engine or engines to which you connected the tachometer sensor from the CCU For a single engine boat select Tachometer Analog Port or Tachometer Analog Starboard according to how you conne...

Page 17: ...is only applicable to power boats and appears only when GPS is selected as the speed source and Planing Hull is selected as the vessel type 1 Note the speed over ground reading from the instrument on...

Page 18: ...he boat using the autopilot the boat should approach and settle on the desired heading with minimal overshoot and oscillation 3 Select an option If the boat turns too quickly or too sluggishly adjust...

Page 19: ...2 On the GHC 10 select Menu Setup DealerAutopilot Configuration Autopilot Tuning Rudder Rate Limiter 3 Select Continue Autopilot takes control of the rudder 4 Use the arrows on the GHC 10 to adjust t...

Page 20: ...e GHP 12 Use the advanced tuning procedures only if you would like to make slight adjustments to the performance of the drive unit Tuning the Speed on a non Garmin Drive Unit This setting does not app...

Page 21: ...ields for 30 seconds If the power usage field fluctuates then your error tolerance is set too low If the power usage field stays at 0 but the rudder error field shows and unacceptable degree of error...

Page 22: ...one receiving Rx line the NMEA 2000 bus and the NMEA 0183 device must be connected to a common ground Example Three of Three Only One Transmitting Wire If your NMEA 0183 compatible device has only one...

Page 23: ...inum alloy waterproof to IEC 529 IPX7 standards GHC 10 power usage 2 5 W max NMEA 2000 input voltage 9 16 Vdc NMEA 2000 LEN 6 300 mA NMEA 2000 PGN Information CCU Type PGN Description Receive 059392 I...

Page 24: ...ct Information 128259 Water Speed 129025 Position Rapid Update 129026 COG SOG Rapid Update 129283 Cross Track Error 129284 Navigation Data 129540 GNSS Sats in View 130306 Wind Data The GHP 12 and the...

Page 25: ...the arrows to adjust the value Speed Source Setup power boat only Max Speed Allows you to adjust the maximum speed of your boat If the value does not match the value on the GHC 10 use the arrows to ad...

Page 26: ...been set If this value is too high the autopilot will overcompensate for cross track error If this value is too low the autopilot will allow a large long term cross track error Steering System Setup...

Page 27: ...ng System Setup Rudder Sensor Setup Calibrate Rudder Sensor Initiates a procedure which establishes the maximum range of movement of the rudder and calibrates the rudder sensor If an error appears dur...

Page 28: ...iated Would you like to continue The autopilot has detected that the user has attempted to initiate a gybe Sounds alarm GHC10 prompts for user input Selecting Gybe initiates the gybe and selecting Can...

Page 29: ...P 12 Installation Instructions 29 Mounting Templates Use the following mounting templates during the mounting process ECU Mounting Template CCU Mounting Template Up when installing on a vertical surfa...

Page 30: ...30 GHP 12 Installation Instructions This page is intentionally left blank...

Page 31: ...Connect the drive unit to the ECU Mount the CCU page 10 in a location free of magnetic interference Use a handheld compass to test for magnetic interference in the area Mount the CCU in the bracket s...

Page 32: ...bligation to notify any person or organization of such changes or improvements Visit the Garmin Web site www garmin com for current updates and supplemental information concerning the use and operatio...

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