Quote: Originally Posted by
DarquePervert 
The power draw of an LCD is not very heavy.
As such, there should be no issue tapping into an existing circuit for the purpose of powering an LCD. Lots of members power their LCDs this way.
True it should not be a problem but it is sort of an electrical no-no to cascade things off of what is supposed to be a trigger line only. It leads to bad habits and people thinking they can power anything off of it, and it is better to power it off of an IGN tripped relay.
But again, powering it directly from the ign line should be ok.