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RE: '93 Audi 90 - Power System
I don't know if anyone has responded to this problem, because i am WAY
behind on reading my digests, but I think I know what the problem may
Is sounds like all of the circuits that don't work are a part of the
"load reducing relay." The same thing happened to my Vanagon a while
ago, and the problem was the ignition switch itself. When you turn
the key to the "start" position, it opens this relay to kill these
circuits to make it easier for the starter to start the car.
In my car, these circuits would not positively reactivate, when the
key was turned back to "run." Jiggling the key a little served as in
interim solution, until after while, I could never get these circuits
to come on.
The solution was to replace the ignition switch, which is located
behind the key cylinder. It's been fine ever since.
Out of curiosity, I dissected the old switch, to see what it's problem
was. Somehow the failure initiated with a poor contact, which,
generated heat, causing the plastic housing to soften, and the
pressure on the contacts to lessen, as the contacts sunk into the soft
plastic, which made the contact progressively worse. Ultimately it
stopped making contact entirely.
So, take a look for that. Hope this helps.
Date: Thu, 23 Oct 97 18:10:52 -0800
From: Stephen Saylor <email@example.com>
Subject: '93 Audi 90 - Power System
any info on the following would make me smile.
my '93 - 90 has decided to start behaving as if the ignition system is
not engaged. ie. electrical system behaves similarly to condition
key is "in" however engine is not running.
conditions: motor running, all system go.
all fuses good
symptoms: no head lights (running lights ok)
no power windows
no turn signals
I assume this is some sort of relay problem however I've not pin
the culprit. I had the dealer check my VIN for recall notice however
car came up clean for a similar ignition system problem.
best, - sds