Glad to here that it works!
The instruction guide was a little fuzzy. For Ford cars 79-96 it says for type of system, 3N (3wire negative system), 3P (3wire positive system), and 5RP (5 wire reverse polarity system).
Any chance you remember which it is/was?

- Jim

'96 Mystique GS, Ztech - ATX,
with CD changer, Sylvania Cool Blues, sunroof, keyless entry, and 9mm blue wires