Garmin ONDECK GTB 10 Installation Instructions Manual page 11

Installing a Relay Switch
You can use an external relay switch to turn on and off an item, such as a light, on your vessel remotely, using
the ActiveCaptain app. One 12 V relay is included. If you need more relays or 24 V relays, they are available
separately for purchase at garmin.com.
To avoid potential damage to the relay switch, GTB 10 black box device, and device being switched, you must
install this relay switch in a dry location.
1 Connect the correctly colored wire on the IN/OUT wiring harness to the negative control (white) wire on the
relay.
See IN/OUT Cable Pinout,
NOTE: Do not connect these wires to the positive side of a power source.
2 Connect the positive control (black) wire on the relay to a 1 Amp fuse and the positive side of the same
power source as the GTB 10 black box device.
NOTE: Even though the relay switch and the GTB 10 device have different power ratings, the inputs must be
connected to the same power source.
3 Connect the positive wire from the power cable for the item to be controlled to the negative load (blue) wire
on the relay.
4 Connect the positive load (yellow) wire on the relay to the positive terminal of the item's power source.
NOTE: The wire used in step 4 should be the same or greater gauge wire to what was used in step 3.
NOTE: You must follow the output power ratings listed in the specifications for the relay type being used.
5 Complete the installation of the item to be controlled by connecting the negative wire from the item to the
negative side of the power source.
You must set up the relay switches in the ActiveCaptain app.
Relay Connection Diagram
To avoid potential damage to the relay switch, GTB 10 black box device, and device being switched, you must
install this relay switch in a dry location.
NOTICE
page 8.
NOTICE
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