[s-cars] Continued Electrical Problems - Door Locks/Alarm

[Calvin & Diana Craig]

Two things to look at.  Like Kirby said, the wiring in the door can
sometimes cause problems, although in your case my guess is that this is not
the culprit as usually the symptoms of this are something that doesn't work
rather than something that triggers too often.

My second thought revolves around the fact that the problem has to be
something that can both cause a reinforcement of the present state, i.e.
when the locks are already unlocked they try to lock again, and at the same
time it can also cause opposition, i.e. when you are trying to unlock the
car and it tries to lock itself back.  Since these are not false signals in
the same direction, viewed from a relative or absolute perspective, this
would seem to me to narrow the culprits down to a very narrow list that can
cause this type of behavior.  I don't think it can be a simple switch
somewhere going bad or a short in a wire.  I don't have the Bentley books
for these cars like I do the 200's so I can't look at the schematics first
hand, but I would start going through them and figuring this out.  You do
need some sort of electrical background, though.  And of course the secret
decoder ring for Bentley schematics :)  Good luck!

--Calvin


-----Original Message-----
From: s-car-list-bounces at audifans.com
[mailto:s-car-list-bounces at audifans.com]On Behalf Of Mike at Home
Sent: Tuesday, April 13, 2004 10:41 PM
To: s-car-list at audifans.com
Subject: [s-cars] Continued Electrical Problems - Door Locks/Alarm


Hi Guys - I took the advice a few of you gave me a couple of weeks ago and
still have not been able to fix the door lock problem I'm having. The advice
given was the removal of the "A1" relay in the fuse box and optionally going
through the battery disconnect sequence. Neither one of those remedies
worked.

Here are the symptoms again:  When trying to unlock the door from the
outside manually with the key, the door lock knob comes up, but then
immediately goes back down and the alarm sets. The only way I can get in the
car is to hold the key in the unlock position for about 2-3 seconds, then
the knob stays up. Once in the car, intermittently the door lock with lock
and the alarm will set. This prevents me from starting the car. In that
case, I need to turn on the ignition, roll down the window and manually open
the door lock with the key. Also intermittently, the alarm will set as soon
as I put the key in the ignition. When that happens, the door locks lock and
the alarm sets, again preventing me from starting the car.

On a possibly related note, I can hear the door locks trying to open while
I'm driving. There is a sound from the back seat that whirs intermittently
for about a minute or so.

The battery is brand new and fully charged and I don't appear to be having
any other electrical issues at this time.

Your insight appreciated.

Mike Bishoff
Seattle, WA
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