5ktq electrical problems update (not fixed)

[Huw Powell]

>>So where are you measuring the voltage at?
>
> Measuring voltage usually at the battery, ECU, rad fan, and front engine bay
> battery access terminal. Also a few other places sometimes.

Good.  The other half of that question is, where are you grounding your
meter for each of these measurements?

> I assume the alternator grounds through the engine because there is no
> ground wire on it. Its solidly bolted on.

That is correct.  Have you checked that solid bolting for corrosion or dirt?

Have you taken a close look at the small wire (should be blue) going to
the alternator yet?  Measured its voltage at idle and with lights on?

Have you checked the voltage at idle/under load (lights on) at places
like the power feed to the ignition computer?

There's something really odd wrong if your systems are failing when the
car is still above 12 volts, something besides a possible charging issue.

--
Huw Powell

http://www.humanspeakers.com/audi

http://www.humanthoughts.org/