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power cable when the unit is not in use. When you are not using
the unit, you should always shut off power to the power cable, es-
pecially when the power cable is disconnected from the unit.
Power connections for the X-4 Pro
sonar units (direct battery connection shown).
If possible, keep the power cable away from other boat wiring, especial-
ly the engine's wires. This will provide the best isolation from electrical
noise. The power cable has two wires, red and black. Red is the positive
lead, black is negative or ground. Make sure to attach the in-line fuse
holder to the red lead
as close to the power source as possible.
For example, if you have to extend the power cable to the battery or
power buss, attach one end of the fuse holder directly to the battery or
power buss. This will protect both the unit and the power cable in the
event of a short. It uses a 3-amp fuse.
Caution:
Do not use this product without a 3-amp fuse wired into the
power cable! Failure to use a 3-amp fuse will void your warran-
ty.
This unit has reverse polarity protection. No damage will occur if the
power wires are reversed. However, the unit will not work until the
wires are attached correctly.
Mounting the Sonar Unit: In-Dash, Bracket or Portable
You can install the sonar unit on the top of a dash with the supplied
bracket. This unit can be installed in a dash with the optional FM-6 in-
dash adapter kit. The FM-6 kit includes an instruction sheet, part 988-
0147-631, which contains a template for cutting out the mounting hole.
This document can be downloaded free from www.lowrance.com.
12 volt
battery
Black wire
Red wire with
3 amp fuse
To unit
