Garmin GPSMAP 421/421s Installation Instructions Manual - Page 9

Browse online or download pdf Installation Instructions Manual for Marine Equipment Garmin GPSMAP 421/421s. Garmin GPSMAP 421/421s 12 pages. Marine navigation equipment
Also for Garmin GPSMAP 421/421s: Reference Manual (2 pages), Technical Reference (42 pages), Important Safety Information (48 pages), Installation Instructions Manual (28 pages), Template Manual (2 pages), Declaration Of Conformity (1 pages)

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Garmin GPSMAP 421/421s Installation Instructions Manual
Connecting Cables to the Chartplotter
Use the diagrams below to help identify the connectors on the back of your GPSMAP 400/500 series chartplotter. Every possible chartplotter
configuration is not represented in the diagrams, but every possible connector type is listed for identification purposes. Every connector on the
back of the chartplotter may not be used for all installations.
GPSMAP 421, 441, and 451
GPSMAP 420, 430, 431, 440, and 450
GPSMAP 521, 541, 551

Testing the Installation

To turn on your chartplotter for the first time, press and hold the
and the SeLect keys, follow the screens to configure your chartplotter.
Testing the Optional Transducer Installation
Because water is necessary to carry the sonar signal from the sounder, the transducer must be in the water to work properly. You cannot get a
depth or distance reading when the transducer is out of the water.
When you place your boat in the water, check for leaks around any screw holes that were added below the water line. Do not leave your boat in
the water for an extended period of time without checking for leaks.
GPSMAP 400/500 Series Installation Instructions
➋
➌
➌
➊
➋
➌
➌
➎
➊
GPSMAP 430x and 440x
➍
➊
GPSMAP 530, 535, 540, and 545
➋ ➊
GPSMAP 526, 536, 546, and 556
PoWeR key until the chartplotter beeps and turns on. Using the ROCKER
➊
Wiring harness
➋
NMEA 2000
➌
External GPS
antenna (sold
separately)
➍
Compatible XM
antenna with
audio adapter
(sold separately)
➎
Compatible XM
antenna (sold
separately)
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