I'm looking at my fuse block and noticed a wire from fuse #9 is not connected. (see illustration) According to the wiring schematic there should be two wires coming off fuse 9, a blue going to the cigar lighter, and a blue/black going to the starter interlock, both accounted for in the illustration. The schematic does not show this third wire, and I cannot figure out what it is for and if I need to hook it up.
My car is a later 1974 L model and is completely stock as far as I know. Any ideas?