This is really piquing my curiosity.

There is a strap fuse in the glow controller for over current, i.e., a short to ground glow plug, of which I've never seen, always the other way the burnout open, and the glow light doesn't come on telling you a plug is out.

One would think if there is a direct short to ground, like it's behaving, the strap fuse would blow or something would melt!