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LST-3800 cable connections.
In the configuration above, the unit is always on. It will draw 11 milli-
amps of current with the backlight off and 40 milliamps with the back-
light on full brightness. Typically, the maximum recommended current
load on a boat in storage is about 50 milliamps. A battery will self dis-
charge at a rate of about 9 milliamps. A battery's normal discharge plus
the gauge current (lights off) amounts to approximately 20 milliamps,
well below the recommended load limit in storage.
To automatically have the gauge backlights turn on when you turn on the
other dashboard lights, connect the red dash light wire to the switch con-
trolling the dash lights.
If you want to turn off the gauge when your not using it, connect the red
wire from the power/transducer cable to your boat's accessory switch, or
install an optional switch between the unit and the power source. See the
following figure.
This wire configuration lets you turn off the gauge when it's not in use.
12 volt
battery
Red to dash
light switch
Black
wire
LST 3800 housing
Red wire
and fuse
Power/transducer cable
Buzzer
Buzzer red wire
to boat power
LST black wire to
buzzer black wire
Accessory
switch
Power/transducer
cable
Black
wire
Red wire
and fuse
12 volt
battery
Transducer