'88 5000CS Quattro Electrical Gremlin - Requesting Diagnostic Help

[Huw Powell]

> 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.
>
> 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.
>
> Can anyone thing of a common place to look where all those circuits
> interact???  I just doesn't make sense except for maybe the fuse block...

fuse 2 and 3 are both battery buss (30) circuits.  2 seems to run
nothing much other than the flasher switch; 3 is for the brake lights
and horns.

inserting fuse 4 could be turning on the interior light delay unit I
suppose, and if it has alternative power to keep it going that would
perhaps explain some of the problem.

There could of course be melted wires touching each other in the
harness, which would not matter much, or at least be noticeable, if the
circuit swere all battery circuits.  Until, of course, they start
turning each other on and off...

--
Huw Powell

http://www.humanspeakers.com/audi/

http://www.humanthoughts.org/