Quoted from KingVidiot:Could someone please point me to a for-dummies tutorial on how to use a multimeter to measure the 12v?
on your 5 bank opto board for the drop targets you should see 9 pin connector to header J1?
with your meter set to DC volts, put the red probe from your meter on a grey/yellow wire pin 8 (12VDC from J118 pin 2) and the black probe from your meter on a black wire pin 9 (ground from J118 pin 3).......what reading do you see in the display of your meter?