Yes it will show battery voltage or alternator voltage. You just have to add that page.
Press menu page
then up or down arrow to select pages
Press menu
use up or down to select add page
press menu
use up or down to select the page your want Battery voltage
press menu
this will take you to the page you selected.
I will include the link where you can find the manual. Information is on page 16.
Sorry i should've been more clearer. I have that setup to display that page but it always shows nothing. I don't have the lmf-200 connected to the engine harness. I don't think they make one
