You're in the middle of a guessing game that might be more work than
just opening up the harness. That's my suggestion, open it up on a
table where you can spread it out and verify each individual wire
against a diagram. Believe me, it'll save you time in the long run
and could potentially save your ecu when you blindly hook up power to
the wrong wire.
Don't mean to be a fear mongerer....just feel that you'll be happier
with the outcome if you pull the harness and dissect.
All the best,
Brent
--
Brent Weide
Portland, Oregon
www.weidefamily.net/vanagon/
Brent Weide