gnappi
Well-known member
I got frustrated trying to find a commonly found, uncomplicated, inexpensive switch that I can buy most anywhere that can be used for an anchor / running light, and I also wanted some red / white LED courtesy interior lighting without having too many switches.
The switch (shoreline marine SL51351 on-off-on ) I decided on is rated at 15 amps so if you're running low power LED's which will run in the low single digit current draw the switch is well within safe operating limits. Even old fashioned filament bulbs won't draw near that much current. If the switch should ever go bad a replacement is only as far away as a local Wal Mart.
I genned up the switch diagram below which is very simple to wire up.
Obviously the current capacity of the diode should be selected to exceed the draw of either the bow or stern lamps, but I used a IN5391 6 amp, overkill yes but it's what I had lying about.
Notes: The switch LEDs both illuminate depending on whether one or both circuits are selected (but are off in the center position) and the jumper / diode connections are only made on the end terminals NOT the center DC in / feed wires. The diode acts as a simple steering diode which conducts in one direction and not the other.
The switch (shoreline marine SL51351 on-off-on ) I decided on is rated at 15 amps so if you're running low power LED's which will run in the low single digit current draw the switch is well within safe operating limits. Even old fashioned filament bulbs won't draw near that much current. If the switch should ever go bad a replacement is only as far away as a local Wal Mart.
I genned up the switch diagram below which is very simple to wire up.
Obviously the current capacity of the diode should be selected to exceed the draw of either the bow or stern lamps, but I used a IN5391 6 amp, overkill yes but it's what I had lying about.
Notes: The switch LEDs both illuminate depending on whether one or both circuits are selected (but are off in the center position) and the jumper / diode connections are only made on the end terminals NOT the center DC in / feed wires. The diode acts as a simple steering diode which conducts in one direction and not the other.