Car Fax Request and wiring fun

Brett Dikeman brett at
Tue Sep 2 00:57:36 EDT 2003

> Mandatory Audi content,
> I spent the weekend chasing instrument cluster problems in my son's '89
> 100Q.  It started with lightly glowing turn signals and ended with a
> flash.  I quit while I was behind and called Chris Semple to get another IC
> and we'll see what went up with the flash. A quick lesson in wiring
> diagrams and I'll be all set.  Good thing I have all the way until next
> Sum. before my son needs to go back to school with the car!

Glowing turn signals(usually only with the headlights or highbeams on- can
also be accompanied by a dead/darkened trip computer display) is the infamous
cracked solder joint.  Top of the PCB, right over the speedo.  Easily fixed
either by solder(semi-temporary repair, good for another 100K) or running a
new wire or two between solder points(permanent repair)- no new IC needed,
unless you're positive you fried something(and even then, it may only be the
voltage regulator, which is easily replaced).  The instructions have been
linked to many times in posts to the 200q20v list- I think Chris Miller's page
probably also has a link to them.


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