Humminbird 987C SI COMBO manual Connecting the Control Head Power Cable to the Boat

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CONNECTING THE CONTROL HEAD POWER CABLE TO THE BOAT

		1	2	3	4
					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.
1	Power				CAUTION: Some boats have 24 or 36 Volt electric systems, but the control head MUST be
2	Temperature
					connected to a 12 VDC power supply.
3	Communications	5			The control head power cable can be connected to the electrical system of the boat at one
4	Transducer
					of two places: a fuse panel usually located near the console, or directly to the battery.
5	Cable Collector Insert

	2
1	POSITIVE
	4
	GROUND

5 1 Cable Collector Insert

2Screws

3	Cable Collector Cover	NOTE: Make sure that the power cable is disconnected from the control head at the
		beginning of this procedure.

4Tab on Insert

3	5 Slot on Cover	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
	Plug the Cable Connector Assembly to the Back of the Control Head	ground (-), and the red wire to positive (+) 12 VDC power.

1b. If you need to wire the control head directly to a battery, obtain and install an inline fuse holder and a 2.5 to 3 Amp fuse (not included) for the protection of the unit. Humminbird® is not responsible for over-voltage or over-current failures.

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.

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