I was replacing my oil gauge when I noticed that wire #39 was loose . It is green and it is close to the fuse box. I traced the other end to the preheaters. I looked at John's website for a wireing diagram but the wires are not numbered the same . Is there a diagram that list the wire nmbers? I think it will end up at the 30 amp fuse at the fuse box but I am not for sure. Robby