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Item Description

Notes

Ê

Solenoid power cable

Sold separately.

Ë

Starboard solenoid

Ì

Port solenoid

Í

Bypass solenoid

May not be present in all systems.

Î

Auxiliary steering system May not be present in all systems.

Wire Color

Description

À

Red

Connect to starboard solenoid positive (+).

Á

White/red

Connect to starboard common (-).

Â

Black

Connect to port solenoid positive (+).

Ã

White/black Connect to port common (-).

Ä

Blue

Connect to bypass solenoid positive (+).
Cut and tape this wire if no bypass solenoid is 
present.

Å

White/blue Connect to bypass solenoid common (-).

Cut and tape this wire if no bypass solenoid is 
present.

Æ

N/A

Auxiliary steering starboard positive (+) (if 
present).

Ç

N/A

Auxiliary steering port positive (+) (if present).

È

N/A

Auxiliary steering bypass positive (+) (if present).

É

N/A

Auxiliary steering common (-) (if present).

5

Connect the solenoid power cable to the ECU.

Installing a Garmin Rudder Feedback Sensor

If you installed a drive unit provided by Garmin, rudder feedback 

data is provided by the drive unit, and a separate rudder 

feedback sensor is not required. If you are connecting the 

autopilot to a drive unit not sold by Garmin, you must also install 

a rudder feedback sensor, such as the GRF 10 (sold 

separately).

Follow the installation instructions provided with your GRF 

rudder feedback sensor to connect it to your rudder control 

and autopilot system.

Connecting to an Existing Rudder Feedback Sensor

If you connected the autopilot to a drive unit not sold by Garmin, 

and you plan to connect to a rudder feedback sensor not sold by 

Garmin, you must use a rudder feedback cable to connect your 

sensor to the GHP Reactor Mechanical autopilot. This cable is 

sold separately.

NOTE: 

The GHP Reactor Mechanical autopilot is compatible 

with a typical three-terminal, potentiometer-type rudder feedback 

sensor only. The system does not work with a frequency-based 

rudder feedback sensor.

1

If necessary, use the installation instructions provided with 

the rudder feedback sensor to install it on your boat.

2

If your rudder feedback sensor has cables connected, 

disconnect the cables.

3

Consult the documentation provided by the manufacturer of 

your rudder feedback sensor to identify the connections on 

your rudder feedback sensor.

4

Connect the rudder feedback cable (not included) to your 

drive unit, based on the wire colors and functions in the table.
If necessary, the cable can be extended using 22 AWG 

(0.33 mm

2

) wire.

Wire Color

Function

Red

Rudder feedback positive (+)

Black

Rudder feedback negative (-)

Yellow

Rudder feedback wiper

5

Connect the rudder feedback cable to the ECU.

Connecting the CCU

1

Route the connector end of the CCU cable to the ECU and 

make the connection.

2

Route the red and blue wires from the bare-wire portion of 

the CCU cable to the location where you plan to install the 

alarm (

Installing the Alarm

).

If the cable is not long enough, extend the appropriate wires 

with 0.08 mm

2

 (28 AWG) wire.

3

Route the brown and black wires from the bare-wire portion 

of the CCU cable to the location where you plan to install the 

Shadow Drive

 () (optional).

If the cable is not long enough, extend the appropriate wires 

with 0.08 mm

2

 (28 AWG) wire.

If you do not plan to install the Shadow Drive, cut and tape 

the brown and black wires.

Installing the Alarm

Before you can mount the alarm, you must select a mounting 

location (

Alarm Mounting and Connection Considerations

).

1

Route the alarm cable to the bare-wire end of the CCU cable.
If the cable is not long enough, extend the appropriate wires 

with 28 AWG (0.08 mm

2

) wire.

2

Connect the cables, based on this table.

Alarm Wire Color

CCU Cable Wire Color

White (+)

Red (+)

Black (-)

Blue (-)

3

Solder and cover all bare-wire connections.

4

Secure the alarm with cable ties or other appropriate 

mounting hardware (not included).

NMEA 2000 and the Autopilot Components

NOTICE

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

should already be connected to power. Do not connect the 

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 helm control and 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 autopilot package (

Building a Basic 

NMEA 2000 Network for the Autopilot System

).

To use advanced features of the autopilot, optional NMEA 2000 

devices, such as a GPS device, can be connected to the NMEA 

2000 network.
If you are unfamiliar with NMEA 2000, you should read the 

“NMEA 2000 Network Fundamentals” chapter of the 

Technical 

Reference for NMEA 2000 Products

. To download this 

document, select Manuals on the product page for your device 

at 

www.garmin.com

.

6

Summary of Contents for GHP Reactor Mechanical

Page 1: ...bing and a heat gun Marine sealant Portable or handheld compass to test for magnetic interference Anti seize lubricant optional NOTE Mounting screws are provided for the main components of the autopilot system If the provided screws are not appropriate for the mounting surface you must provide the correct types of screws Mounting and Connection Considerations The autopilot components connect to ea...

Page 2: ...ive unit cannot be extended The ECU must be mounted in a location where it will not be submerged or exposed to wash down The ECU power cable connects to the boat battery and it can be extended if needed Power Cable Extensions Drive Unit Mounting and Wiring Considerations If a compatible drive unit is not already installed on your boat the drive unit is sold separately and must be installed by an e...

Page 3: ...oid Drive Unit If you are using the autopilot with a drive unit not sold by Garmin or a solenoid drive unit you must also install a Garmin rudder feedback sensor recommended or connect to an existing rudder feedback sensor using a rudder feedback cable sold separately Drive Unit Installation Alarm The alarm provides audible alerts from the autopilot system and should be installed near the helm con...

Page 4: ...ol into the cutout 13Securely fasten the helm control to the mounting surface using the supplied screws If you are mounting the helm control in fiberglass you should use an anti seize lubricant as advised in the notice 14Snap the decorative bezel À into place Mounting the CCU 1 Determine the mounting location 2 Using the CCU as a template mark the two pilot hole locations on the mounting surface 3...

Page 5: ...ade Connecting to an Existing Drive Unit You must install a drive unit power cable to use a drive unit not sold by Garmin with the GHP Reactor Mechanical autopilot This cable is sold separately These instructions do not apply to a solenoid type drive unit Connecting to a Solenoid Drive Unit 1 If necessary use the installation instructions provided with the drive unit to install it on your boat 2 I...

Page 6: ...eedback cable not included to your drive unit based on the wire colors and functions in the table If necessary the cable can be extended using 22 AWG 0 33 mm2 wire Wire Color Function Red Rudder feedback positive Black Rudder feedback negative Yellow Rudder feedback wiper 5 Connect the rudder feedback cable to the ECU Connecting the CCU 1 Route the connector end of the CCU cable to the ECU and mak...

Page 7: ...d the T connector 7 Repeat steps 2 through 6 for the CCU Connecting Optional Devices to the Autopilot System You can use advanced features of the autopilot system by connecting optional NMEA 2000 compatible devices such as a wind sensor a water speed sensor or a GPS device to the NMEA 2000 network You can connect optional devices that are not NMEA 2000 compatible to the helm control through NMEA 0...

Page 8: ...ntrol of the rudder 4 Without touching the rudder or helm control allow the autopilot to calibrate the rudder 5 Select an option If the calibration did not complete successfully repeat steps 1 through 4 If the calibration completed successfully select OK Enabling the Shadow Drive If you installed the autopilot on a boat with a hydraulic steering system you can install a Garmin Shadow Drive valve s...

Page 9: ...ght line If you are performing this procedure outside of the Sea Trial Wizard from the heading screen select Menu Setup Dealer Autopilot Configuration Automated Setup Calibrate Compass Begin 2 Follow the directions on the helm control until calibration is complete taking care to keep the boat as steady and flat as possible The boat should not list during calibration 3 Select an option If the calib...

Page 10: ...ing until it matches north on the magnetic compass 3 After the fine heading setting matches north on the magnetic compass select Done Testing and Adjusting the Configuration NOTICE Test the autopilot at a slow speed After the autopilot has been tested and adjusted at a slow speed test it at a higher speed to simulate normal operating conditions 1 Drive the boat in one direction with the autopilot ...

Page 11: ...Dealer Autopilot Configuration Steering System Setup Drive Unit Class 3 Select Other or Solenoid according to the setting chosen in the Dockside Wizard 4 Select an option Select Generic Tune to re run the tuning procedure you completed during the Dockside Wizard Tuning an Existing Drive Unit Select Drive Unit Voltage to adjust the drive unit voltage according to the specifications provided by your...

Page 12: ...ive Unit Class 2 Select Other or Solenoid according to your selection in the Dockside Wizard 3 Select Advanced Tuning Tune Error Tolerance 4 Center the rudder position let go of the rudder control and select Begin 5 Select Tune The rudder position moves from 5 to 5 each time you select Tune and the drive unit steers the rudder accordingly 6 After the drive unit stops observe the Rudder Error and P...

Page 13: ...ire Rx A from the helm control and the green wire Rx B from the helm control must be connected to NMEA 0183 ground À NMEA 2000 network provides power to the helm control Á 12 Vdc power source  Helm control à NMEA 0183 compatible device Wire Helm Control Wire Color Function NMEA 0183 Compatible Device Wire Function Ê N A Power Ë Green Rx B connect to NMEA 0183 ground NMEA 0183 ground Ì Blue Tx A R...

Page 14: ...129283 Cross track error 129284 Navigation data 130306 Wind data Helm Control Type PGN Description Transmit and receive 059392 ISO Acknowledgment 059904 ISO Request 060928 ISO Address Claim 126208 NMEA Command Request Acknowledge Group Function Type PGN Description 126464 Transmit Receive PGN List Group Function 126996 Product Information Transmit only 128259 Water Speed 129025 Position Rapid Upda...

Page 15: ...RPM Limit Allows you to adjust the lowest RPM point of your boat If the value does not match the value on the helm control you can adjust the value High RPM Limit Allows you to adjust the highest RPM point of your boat If the value does not match the value on the helm control you can adjust the value Max Speed Allows you to adjust the maximum speed of your boat If the value does not match the valu...

Page 16: ...lace 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 0808 2380000 In Europe call 44 0 870 8501241 Garmin and the Garmin logo are trademarks of Garmin Ltd or its subsidiaries registered in the USA and other countries GHP GHC Reactor and Shadow Drive are trademarks ...

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