LST black wire to | Buzzer red wire |
buzzer black wire | to boat power |
LST 3800 housing | Buzzer |
| |
| Red wire |
| and fuse |
| Red to dash |
| light switch |
| Black |
Power/transducer cable | wire |
| |
| 12 volt |
| battery |
Transducer |
|
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.
Power/transducer
Black 
wire
12 volt | Red wire | Accessory | |
battery | and fuse | ||
switch | |||
|
|
This wire configuration lets you turn off the gauge when it's not in use.
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