I have a d16y7 turbo tuned on 7psi, I was driving it the other day just fine. When I went out the the next morning it wouldn't start. I changed the plugs and while I was doing a spark plug test I lost power. It used to crank all day and not turn over now I do not have power to anything. Any advice or similar problem. I had to disconnect battery in order for my lights to turn off. Maybe a bad ground or main relay. All help is appreciated

 

So you were doing the test and then just lost power all of a sudden? Did you check all your fuses to see if you blew anything? You might not have had a good ground while testing