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If the handheld compass does not point north when you hold it in the location you want to mount the CCU, then there is magnetic interference. Choose another location and test again. GHP 10 Marine Autopilot System Installation Instructions Opening for cablesMounting screws (. ) ThumbscrewOpening for cables Mounting screws (. ) Thumbscrew 26 GHP 10 Marine Autopilot System Installation Instructions If possible, mount the CCU within 16 ft. (5 m) of the ECU. If you cannot mount the CCU within 16 ft. (5 m) of the ECU, extension and replacement cables are available (see page 4). To mount the CCU bracket: 1. Determine the best location for the CCU on your boat. Use a handheld compass to ensure that the location is free of magnetic interference. 2. Determine the correct type of screws for the mounting surface. Mounting screws are included with the CCU, but you may need to provide different screws if the supplied screws are not suitable for the mounting surface. 3. Use the mounting template provided on page 43. Be sure to install the mounting portion of the bracket with an opening at the bottom. Tape the template to the mounting location. 4. Drill pilot holes at the three mounting locations. 5. Use screws to secure the mounting portion of the CCU bracket. To secure the CCU in the CCU bracket: 1. Connect the CCU/ECU interconnect cable and the NMEA 2000 drop cable to the CCU. 2. Place the CCU in the mounting portion of the CCU bracket with the wires hanging straight down. 3. Place the securing portion of the bracket over the ball and snap it into the mounting portion of the bracket, starting with the two arms that do not have the thumbscrew. 4. Ensure that the cables hang straight down, and connect the arm with the thumbscrew. The cables must hang straight down for the CCU to accurately read your heading. 5. Hand-tighten the thumbscrew until the CCU is held firmly in the bracket. Do not overtighten the thumbscrew. Wiring the CCU Route the connector-terminated end of the CCU/ECU interconnect cable to the ECU and make the connection. Do not connect the bare-wire portion of the cable CCU/ECU interconnect cable at this time. Before you connect the bare-wire portion, install the Shadow Drive and the alarm buzzer (page 27), and mount the GHC 10 (page 28). Installing the Shadow Drive Install the Shadow Drive by connecting it to the hydraulic steering line of your boat and wiring it to the CCU/ECU interconnect cable. Connecting the Shadow Drive to the Hydraulics Choose a location at which to connect the Shadow Drive to the hydraulic steering of your boat by consulting the hydraulic-layout diagrams starting on page 9. Use the included connectors to install the Shadow Drive in the hydraulic line. When connecting the Shadow Drive to the hydraulic system: Install the Shadow Drive lower than the helm, but higher than the pump. Mount the Shadow Drive horizontally and as level as possible, using cable ties to firmly secure it in place. Avoid making loops in the hydraulic lines. Install the Shadow Drive closer to the helm than to the pump. Do not mount the Shadow Drive within 12 in. (0.3 m) of any magnetic interference such as speakers and electric motors. Do not install the Shadow Drive directly to the fittings at the back of the helm. Install a length of hose between the 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. In a single-helm installation, do not install a T-connector between the helm and the Shadow Drive. In a dual-helm installation, install the Shadow Drive between the pump and the lower helm, closer to the helm than to the pump. Install the Shadow Drive in either the starboard steering line or the port steering line. Do not install the Shadow Drive in the return line. Do not use Teflon tape on any hydraulic fitting. Use an appropriate thread sealant such as Loctite Pro Lock Tight multipurpose anaerobic gel, part number 51604, or equivalent, on all pipe threads in the hydraulic system. • • • • • • • • • • Cables Thumbscrew Wiring the Shadow Drive Wire the Shadow Drive to the CCU/ECU interconnect cable. to wire the Shadow Drive: 1. Route the bare-wire end of the CCU/ECU interconnect cable to the Shadow Drive. If the cable is not long enough, extend the appropriate wires with 28 AWG wire. 2. Use the Shadow Drive Wiring Table to make the appropriate connections. Shadow Drive Wire Color CCu/ECu Interconnect Cable Wire Color Red (+) Brown (+) Black (-) Black (-) Shadow Drive Wiring table 3. Solder and cover all bare-wire connections. Wiring the GHP 10 to the tachometer The tachometer connection is an important part of the GHP 10 system, and must be wired correctly for the autopilot to function. If your engine supports NMEA 2000 engine data, and is connected to the same NMEA 2000 network as the GHC 10 and the CCU, then no other tachometry wiring is necessary. For more informat...

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