Not sure if the car has rear defrost but it does have a tach. I do have a black jumper (pretty sure it's black), it goes from the second terminal from the top left to the third on the bottom. It's the wire that has a bit of white paint on it.
Something way wrong with that statement.
The top of the pic... that's the line in side of the fuse box. Each buss bar should need only 1 supply wire. The bottom of the pic is branch circuits out. The only current path from top to bottom or in to out should be through a fuse. So like the drawing above jumper from one buss bar to another labelled 14-BK is more correct. Line out to a tach or anything else would be at bottom, after the fuse.
