Garmin REACTOR 40 KICKER Installation Instructions Manual page 22

Only One Receiving Wire
If your NMEA 0183 compatible device has only one receiving wire (Rx), you must connect it to the blue wire
(Tx/A) from the helm control, and leave the white wire (Tx/B) from the helm control unconnected.
NMEA 2000 network (provides power to the helm control)
12 Vdc power source
Helm control
NMEA 0183 compatible device
Wire Helm Control Wire Color — Function
N/A
N/A
Blue — Tx/A (+)
White — unconnected
Brown — Rx/A (+)
Green — Rx/B (-)
NOTE: When connecting a NMEA 0183 device with only one receiving (Rx) line, you must connect the NMEA
2000 bus and the NMEA 0183 device to a common ground.
22
NMEA 0183 Compatible Device Wire Function
Power
NMEA 0183 ground
Rx
N/A
Tx/A (+)
Tx/B (-)