Garmin GNC 420A Installation Manual page 31

4.1.2 P4002 (GNC 420 and GNS 430 Only)
Pin Pin Name
1 RESERVED
2 RESERVED
3 RESERVED
4 COM MIC KEY
5 INTERCOM MIC HI
6 COM MIC AUDIO HI
7
500 COM AUDIO HI
8 RESERVED
9 RESERVED
10 RESERVED
11 AIRCRAFT POWER
12 AIRCRAFT POWER
13 RESERVED
14 TRANSMIT INTERLOCK
15 COM REMOTE TRANSFER
16 SPARE
17 INTERCOM MIC LO
18 COM MIC AUDIO LO
19
500 COM AUDIO LO
20 RESERVED
21 AIRCRAFT GROUND
22 AIRCRAFT GROUND
23 RESERVED
24 RESERVED
25 RESERVED
400 SERIES INSTALLATION MANUAL
190-00140-02
View of J4002 connector from back of unit
1 2 3 4 5 6 7
17 18 19 20
14 15 16
8 9 10 11 12
13
21 22 23 25
24
I/O
--
--
--
In
In
In
Out
--
--
--
In
In
--
In
In
--
In
In
Out
--
--
--
--
--
--
Page 4-3
Rev Q