Originally Posted by az_gila
Simply connect it to your main power bus.
You can set up the colored indicators on the Skyview widget to change color when the voltage drops from a charging voltage - green at 14.1v - to a fully charged battery under a light load - yellow at 13v. A good indication of alternator failure or being off-line.
Pick numbers to suit your battery/charger combination.
This is exactly what I did for my EMS pin#1, connected to my main power bus. But since I only have one battery, I used pin #2 differently.
I connected pin #2 directly to where power connects to my electrical fuel boost pump. Then I set a button to be BLACK when under 1v and turn BLUE if over 1v. So when the electrical fuel boost pump is "OFF" the button is BLACK. When the electrical fuel boost pump is "ON" the button turns BLUE. I used BLUE since Avgas is blue but you can use any color.
You can see the button showing the fuel boost pump (FUELPM) is off in this photo.
In this photo you can clearly see the electric fuel boost pump is "ON".
I can't tell you how many times this has prevented me from forgetting to turn the boost pump "off" after changing tanks, or worse, forgetting to turn the boost pump "on" prior to take off. Just my 2cents.