[200q20v] A/C electronic jolt fix update
knotnook at traverse.com
Tue Sep 26 19:50:31 EDT 2000
Following a response from Scott Mockry that I should ground the diode wired
into the repair harness, I figured out a way to screw the diode to a good
ground and the click I was hearing in the stereo now has disappeared. The
TSB calls for anchoring the diode to the hold-down that secures both wires
coming from the clutch magnet, but there's no room for me to get the
fastening screw loose, so I fashioned my own grounding bracket with a piece
of angle iron that I tapped to accept the screw supplied with the harness
and then bolted to the A/C bracket.
At 01:03 PM 09/26/2000 -0400, Kneale Brownson wrote:
>I've finally obtained and installed the wiring "harness" and compressor
>relay as outlined in Audi's TSB for Group 87 #92-02 to stop the A/C
>magnetic clutch from disrupting the ignition, causing a violent misfire,
>when the clutch disengages. The additional symptom of the problem is a
>loud pop in the stereo system.
>The 443 298 008 harness consists of male and female connectors on either
>end of a short piece of wire with a second wire coming off one end and
>going to a diode. The installation is to open the clutch magnet's
>connection to the wiring harness and insert the new connectors. The TSB
>also calls for attaching the diode to a bracket that gets screwed to some
>part of the compressor or its bracketry, but I couldn't see where or how
>to insert the screw, so I just zip-tied the harness and the diode's wiring
>to the same structure the original wiring was zip-tied.
>The relay replacement takes place in the relay panel in front of the
>driver's knees, a spot that's really fun to get to/work in when you have a
>short neck (I'm sometimes referred to as the no-neck monster) and trifocals.
>Anyway, the result is that the violent interruption of ignition while
>driving has disappeared, and the loud pop is now down to a click. The
>latter, which sounds like a pencil being tapped once on the top of a
>wooden desk straight-on, as opposed to sideways like a drummer, is the
>reason for my question: Shouldn't the noise disappear too? Do I need to
>ground the diode on something?
>By the way, thanks immensely to Scott Mockry for alerting us to the TSB
>and supplying the information about what parts are needed to do the "fix".
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