charging problem

Ok, checked the reading between neg batt post and vr, 0.00 ohms when off, between 7 and 8 ohms running, not sure if i did that right. where voltage reg gets power at ballast i had 12 volt and battery had 12.6 volts, so that's my problem, I think I'll just rewire the whole thing and start fresh. Thanks for the help, I knew i wasn't doing something right.