It's funny you got this last post, because I was looking for it to make a correction. The bla/rd powers the cdi AC v. I don't believe this will apply to your scoot, but look at the wires going to your cdi. See if there is a bla/rd on the harness. If so you can trace it back to its source. Also If your cdi is cracked it is a SURE sign it has been overheated, most likely TOAST. You will still need the meter to trouble shoot further