[rsk289]

What does the resistor do? The Ford diagrams may be somewhat different from the original Cobra diagram - I built my wiring around both the 'MkII' AC chassis manual wiring diagram and the '427/MkIII' AC diagram. Neither has a resistor shown, but my circuit connects the stator terminal on the alt to the 'S' terminal on the regulator, rather than direct to the warning light. The 'MkIII' diagram from AC is confusing in that the third connection to the regulator is unlabelled, merely showing 'W' for a white cable. Oh, and don't forget to ground both alternator and regulator cases.
However as stated my car has run with Autolite alternator and regulator exactly as in my own diagram without any problems for some years now.