This one post #3
http://67-72chevytrucks.com/vboard/s...d.php?t=509085
This one is of the 67-72 wiring but is probably close if not the same to our vintage. My 66' has reverse lights, the 64 diagram does not show them, but the 67-72 does.
Post 1, you can click the links for a high res and save it.
http://67-72chevytrucks.com/vboard/s...d.php?t=662676