Garmin GSD 24 Installation Instruction



See the Important Safety and Product Information guide in the GPS device 

product box for product warnings and other important information.

The GSD 24 adapter is not meant for use with a Garmin differential 8-pin 

transducer. Do not cut a Garmin differential 8-pin transducer; instead, plug it 

directly into the GSD 24 according to the GSD 24 Installation Instructions.
Use this adapter to connect a non-differential transducer, such as a legacy 

Garmin/Airmar

®

 6-pin transducer, to a GSD

™

 24 sounder. In order to adapt 

a non-differential transducer for use with a Garmin differential sounder, you 

must cut the connector from your existing non-differential transducer and 

connect the wires to the wire block inside the GSD 24 Transducer Adapter by 

following these instructions.

•  Drill and 

1

/

8

 in. (3.2 mm) drill bit

•  #2 Phillips screwdriver
•  3 mm flat screwdriver
•  Cable ties (optional)
•  Wire cutter
•  Wire stripper
• 

13

/

16

 in. (21 mm) wrench

Consider the following conditions when choosing a location to mount the 

GSD 24 Transducer Adapter.
•  The adapter cable should easily reach the transducer connector on the 

GSD 24 when mounted.
The adapter cable length is 24 in. (60.1 cm).

•  The adapter should not be installed in a location where it is submerged in 

water.

•  The adapter should be located at least 6 in. (15.25 cm) from electrical 

interference such as a motor.

•  If there is not a mounting surface suitable for using the included screws, 

the adapter can be secured to a structure using cable ties (not included).

1.  Use the included template (page 19) to mark the pilot-hole locations.
2.  Drill the two pilot holes with a 

1

/

8

 in. (3.2 mm) drill bit.

3.  Install the included screws in the pilot holes, but do not tighten them flush 

with the surface.

4.  Place the GSD 24 adapter on the screws and slide it in place.
5.  Tighten the screws until the device is securely fastened to the surface.

NOTE: You may find it easier to connect the wires with the GSD 24 

adapter unmounted, and then complete the mounting process.

The GSD 24 adapter is not meant for use with a Garmin differential 8-pin 

transducer. Do not cut a Garmin differential 8-pin transducer; instead, plug it 

directly into the GSD 24 according to the GSD 24 Installation Instructions.

1.  Cut the connector from a non-differential transducer ➊, as close to the 

connector as possible.

➊

➋

➌

➍

2.  Feed the cut end of the cable through the nut ➋ on the side of the housing 

and pull it through the other side.
Do not tighten the nut at this time.

3.  Use the wire stripper to remove about 3 

1

/

2

 in. (90 mm) of the outer cable 

jacket ➌ and foil shield. 

4.  Use the wire stripper to remove about 

1

/

4

 in. (6 mm) of the insulation from 

each internal wire ➍.

  Tinning each of the stripped wires is recommended, but not necessary.
Connecting the Legacy Transducer Wires

Connect the wires to the wire block in the adapter using a 3 mm flat 

screwdriver. 
Consult the wiring table when connecting the wires. Specific examples of 

many Garmin/Airmar transducer wire colors are provided on page 2.

1

Depth +

2

Depth -

3

Shield

4

Ground

5

Temp*

6

XID

7

Speed power

8

Speed data

*If your transducer does not have temperature capability, you must install 

a jumper between connectors 4 and 5 on the wire block.

1.  After all the wire connections are secure, use a 

13

/

16

 in. (21 mm) wrench to 

tighten the nut around the transducer cable.
When tightened correctly you will not be able to pull the transducer cable 

out of the housing.

2.  Place the lid on the adapter and secure it with the four captive Phillips 

screws.

190-00789-08_0C.indb   1

11/8/2011   7:58:48 AM