Humminbird 900 Series - Manual (Page 19)

Connecting the Control Head Power Cable to the Boat
A 6' (2 m) long power cable is included to supply power to the control head.
You may shorten or lengthen the cable using 18 gauge multi-stranded
copper wire.
CAUTION: Some boats have 24 or 36 Volt electric systems, but the control head
MUST be connected to a 12 VDC power supply.
The control head power cable can be connected to the electrical system of
the boat at one of two places: a fuse panel usually located near the console,
or directly to the battery.
NOTE: Make sure that the power cable is disconnected from the control head at
the beginning of this procedure.
NOTE: Humminbird® is not responsible for over-voltage or over-current failures.
The control head must have adequate protection through the proper selection
and installation of a 3 amp fuse.
NOTE: In order to minimize the potential for interference with other marine
electronics, a separate power source (such as a second battery) may be
necessary.
You are now ready to install the transducer. Find the section that refers to
your specific transducer installation method.
1a. If a fuse terminal is available, use crimp-on type electrical
connectors (not included) that match the terminal on the fuse
panel. Attach the black wire to ground (-), and the red wire to
positive (+) 12 VDC power. Install a 3 amp fuse (not included) for
protection of the unit. Humminbird® is not responsible for over-
voltage of over-current failures.
or...
1b. If you need to wire the control head directly to a battery, obtain
and install an inline fuse holder and a 3 amp fuse (not included)
for the protection of the unit. Humminbird® is not responsible for
overvoltage or over-current failures.
GROUND GROUND
POSITIVEP
O
S
IT
IV
E
12