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24 GHP 10 Marine Autopilot System Installation Instructions
Making the Final Power Connections
After all the components are mounted, connected to the hydraulics of your boat, and wired correctly, connect the ECU to the boat
battery and connect the power/data cable to the GHC 10. Use the checklist provided in the back of this manual to ensure that the
preceding installation procedures are complete. Connect the ECU power cable directly to the boat battery if possible. Though it is not
recommended, if you connect the power cable to a terminal block or other source, connect it through a 40 A supply.
CAUTION: Do not remove the in-line fuse holder from the battery cable when connecting to the battery. If you remove the in-line fuse
holder, you will void the GHP 10 warranty, and may damage the GHP 10 autopilot system.
To connect the ECU to the battery:
1. Route the connector-terminated end of the ECU power cable to the ECU, and route the bare-wire end of the ECU power cable to
the boat battery. If the wire is not long enough, use the Wire Gauge Table to determine the correct wire gauge for an extended run.
Extended Length 10 ft. (3 m) 15 ft. (4.5 m) 20 ft. (6 m) 25 ft. (7.5 m)
Recommended Wire Gauge 12 10 10 8
Wire Gauge Table
2. Connect the black wire (-) to the negative (-) side of the battery rst.
3. Connect the red wire (+) to the positive (+) side of the battery next.
4. Connect the ECU power cable to the ECU last.
To connect the power/data cable to the GHC 10:
Align the notches on the cable plug and on the back of the GHC 10. Insert the cable into the connector, and turn the locking ring
clockwise until it stops.
NOTE: After the ECU and the GHC 10 are connected to power, the GHP 10 autopilot system and the NMEA 2000 network can be powered
on.
Bleeding the Hydraulic Steering System
Air must be purged completely from all the hydraulic lines, the helms, the cylinders, the pump, and the Shadow Drive for the system
to function. If the hydraulic system is not bled, then the GHP 10 autopilot system will not work correctly. Follow the instructions
provided by the manufacturer of your steering system to properly bleed the hydraulic system on your boat. Treat the pump as
the lowest helm when bleeding the system.
Notes:
Disable the Shadow Drive from the GHC 10 to make the bleeding process easier. On the GHC 10, select Menu > Setup >
Autopilot Conguration > Hydraulic Setup > Shadow Drive Enable. Change the Shadow Drive Enable setting to Disable.
Remember to enable the Shadow Drive after the bleeding process is complete.
To completely bleed the hydraulic system, it may be necessary to drive the autopilot pump in both directions to remove any air
trapped within the pump. You can do this during the Verify Steering Direction portion of the Dockside Wizard (see page 25).
Drive the rudder to each stop in each direction, and then perform any additional bleeding that may be necessary.
IMPORTANT: Check for leaks at every hydraulic tting, both after the bleeding process is complete and after the sea trial is complete.
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