Turn Signal Update
My son John and I are installing a Turn Signal switch from a 1976 Capri in our '72. The later unit seems to be a bit more robust. The wiring diagram is below for anyone who needs it.
Ok, it's not much of a diagram, but it is accurate. Just run the 1 to the 1, etc. You'll need a relay from Radio Shack. Any SPDT will do with a rating of at least 10 amps I would guess. The wiring on the '72 is just regular quick disconnect type connectors. I soldered to the '76 switch.
The '76 bracket also needs to be cut to fit under the factory trim pannels. I used a hack saw and dressed the edges with a file. A grinding wheel would be really helpfull here. You'll also need to fabricate two small brackets to hold the trim in place.
If anyone really needs this, and can't make heads or tails of my scribbling, just drop me a line.