Garmin GMR 404 xHD Installation Instructions

Garmin Radar Installation Instructions - GMR 404 xHD.
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Marine Ethernet Installation 

Instructions

The Garmin Marine Network is an Ethernet network used to 

share data such as radar, sonar, and detailed mapping. You 

can modify the Ethernet cable to suit your installation needs. To 

obtain the best performance and to avoid damage to your boat, 

install the connector according to these instructions. Read all 

installation instructions before proceeding with the installation. If 

you experience difficulty during the installation, contact Garmin 

Product Support.

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.

Important Safety Information

 WARNING

See the Important Safety and Product Information guide in the 

product box for product warnings and other important 

information.

 CAUTION

Always wear safety goggles, ear protection, and a dust mask 

when drilling, cutting, or sanding.

NOTICE

When drilling or cutting, always check what is on the opposite 

side of the surface.

Preparing the Network Cable
Cleanly cut the Ethernet cable 

À

 to the needed length.

NOTE: Retain the connector for use in step 4.

Remove the strain-relief nut 

Á

 from the cable-connection 

housing 

Â

 and slide the nut onto the cut end of the Ethernet 

cable.

Feed the cut cable end through the connection housing.
Examine the connector removed from the cable and 

compare it to this table to determine whether cable side A or 

cable side B was removed.

Position

Side A

Side B

1

White/Orange

White/Green

2

Orange

Green

3

White/Green

White/Orange

4

Blue

Blue

5

White/Blue

White/Blue

6

Green

Orange

7

White/Brown

White/Brown

8

Brown

Brown

NOTE: As a point of reference, the brown wire will always be 

in position 8.
NOTE: The Garmin Marine Network requires cross-over 

cables not exceeding 100 m between devices.

Using a sharp knife, insert the blade between the cable 

shield and jacket, and slit the jacket 16 mm (5/8 in.) from the 

cut end of the cable.

Peel the jacket back and remove the slit portion.
Trim the drain wire 

Ã

 to approximately 14 mm (9/16 in.) and 

fold the drain wire back over the jacket.

Arrange the individual wires in order according to table 

shown in step 4.
NOTE: When constructing a custom cable from bulk wire, 

you must create both a side A and a side B.

Trim the wires to an even length, leaving approximately 

14 mm (9/16 in.) from the ends of the wires to the jacket edge.

10Wrap the supplied copper tape around the drain wire and 

jacket.

11Using a pair of pliers, squeeze the copper tape to pre-form 

the cable jacket end.

Installing the Network Connector
With the wires in the correct order, insert the wires into the 

modular plug until the ends of the wires touch the bottom of 

the plug.

Verify the wires are in the correct order.
If any wire is not in the correct position, remove the plug, 

arrange the wires in the correct order, and reinsert the wires 

into the plug.

Using a modular plug hand tool, crimp the plug onto the 

wires.

Align the release tab on the modular plug with the 

corresponding notch in the cable-connection housing, and 

push the cable through the connection housing until plug is 

securely seated.

Screw the strain relief nut onto the cable-connection housing 

and tighten with a 15 mm wrench.
NOTE: Do not overtighten the nut.

Install the O-ring onto the housing.

The cable is now ready for use.

April 2014

190-00489-00_0C

Printed in Taiwan

0.614337s