[ImEvil1]

One small change I just realized (not that it matters for Mustangs). The relay for front light cutoff is powered by +12V. In other words, when power is applied to the relay, it activates the cutoff. Makes more sense to have the blue pilot light show lit, meaning the lights are on, just as the red one does. In the pics, when the red is lit, the terminal is putting out +12V. When the blue is lit, the terminal is dead. Therefore, when properly wired, red shows rear lights activated only, red and blue mean everything is on.