from the starter to the relay from what I remember. its direct battery power, full 12v. If it's at the relay, follow it. if not, find it at the starter. if not, maybe someone can show ya a pic of theirs. my car was a V6, so i think it'd be different.The wire goes to the blower relay correct?
Good detective work. However, be advised, there are some folks on ebay selling them in bulk at around $50-60 or so WITHOUT a box/baggie (while claiming they're original Delco parts), which is typical price of an actual Delco part. GM retail is $123.60. But you can buy a 36694 at Advance for around $29. NAPA price is $25.49.Finally, found this thread again. Was looking for that vacuum selector switch.
For future refference, here's the AC DELCO part number for it: 15-71389. Advance Auto #: 36694 Napa: TEM207709