'88 5000CS Quattro Electrical Gremlin - Requesting Diagnostic Help

[Bernard Littau]

[
So I've done the "yank fuses while watching the test light" drill and found
the following:

Fuse 4 - (Interior Lights, Radio...) is the main culprit.  Put it in and
there's draw.

But it gets worse...

Once the draw is started by inserting Fues#4, it will not stop until you've
pulled Fuses #2 and #3.

Without #4 in place, there are no issues.
]

Hi Rob,

You mention some draw, not not an idication of how much draw.  I would not
expect a car like this to be able to sit for a month without draining the
battery down.  On the other hand, it should sit for a week without any
noticable effect.

There will always be some draw.  The clock runs (granted that's a very small
load), there is the alarm, and also the circuitry that runs the interior
light timer, the afterrun timer.   These should all be small loads, but they
will show on a meter.

The radio is also always drawing some small power to keep the presets alive.

If the draw is small, I would say you have no problem.  If you notice the
battery being drained overnight, then it is worth pursuing this further.

Best,

Bernard Littau
Woodinville, WA
'88 5ktq