7
GSD 20 Sonar Module
I
NSTALLATION
I
NSTRUCTIONS
W
IR
E
C
O
LO
R
GARMIN GSD 20
SOUNDER MODULE
BL
AC
K
O
R
AN
G
E
O
R
AN
G
E
R
ED
W
H
IT
E/
BL
U
E
BL
AC
K
R
ED
BL
U
E
BR
O
W
N
W
H
IT
E/
BR
O
W
N
W
IR
E
C
O
LO
R
FU
SE 5A
FU
SE 2A
TO
TRANSDUCER
BA
TT
ER
Y
10
-3
5
VO
LT
S
D
C
B
ASIC
W
IRING
FOR
THE
G
ARMIN
GSD 20
TO
A
S
INGLE
GPSMAP
172/172C
Notes:
1.
Power and ground wires require 18
AWG.
All other wires require 22
AWG. Use 4-conductor
, shielded wiring for runs over 30’
(9.1 m).
2.
Refer to the GPSMAP
172/172C Owner
’s Manual for wiring the GPS 17 sensor and other devices.
3.
For runs over 30’
(9.1 m), the drain wire must be connected to the shielding of the extension run. Do not terminate the end of the shield drain wire.