[V8] our V8 voltmeter

[John Dodd]

I found an old note on how to display voltage on the digital readout(AC
head)
At the same time quickly press the outside temp and off button.
Scroll down to channel 11 using the warmer or cooler buttons. Hit the
outside button again and 
you get a voltage readout.(13.5 V on mine).Press any button to return
back to normal display.(like ECON).
I wonder what else can be displayed. Very neat anyway !
John