Since the flat fuse with the LED of the new product came out, it tried to short-circuit it before use and tried it. I tried 7.8 volts directly on the red 10 A fuse, a superbly fused red LED lamp lighted bright in the middle It turned out that I could use this voltage. Since the rectifying circuit is built inside, I also understood that the orientation (polarity) at the time of installation (when inserting) does not have to worry about it. A good product noticed by breakdown as soon as possible has come out. I will recommend it.
As a matter of course, blown fuse was checked by trying to insert and remove a fuse with doubtful points, but it was easy to understand even by an amateur, and we thought that it is convenient dish that the fuse box is narrow and in a dark place. However, since it is actually used for the first time, I have not yet seen what it will look like.