[Dave at Pelican Parts]

Check the wiring diagrams, either B&W in the Haynes book, or full color available on this site!

The tach icon (a letter in the 74-76 diagrams, something that looks a little like a tach in the older-style ones) will have little numbers next to it. Match the numbers on the diagram to the numbers on the tach, match the wire colors, and you're tere!

For a 74, the black and purple wire (from the points) goes to terminal 1. The red and white wire (switched power) goes to terminal 15. It isn't shown, but I believe the other terminal gets the brown ground wire.

You can check for your own year.

--DD