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Re: Ur-Q Parts & Questions
I have a 1983 ur-q (brown velour upholstery) with a bluish parcel shelf, I
believe it was originally brown but faded over time - it does look strange
and I thought for some time that it had been changed when the stereo was
installed but now I'm fairly certain it is original.
Can't help on the hand brake cable, phone around and make sure you get the
right one (in the US try Carlsen). The 1983 model year was when they went
from two cables to one, so check!
On the computer frequency valve output I can be more help. On my '83 when I
bought the car a previous owner who had exactly the same problem you
described "fixed" the problem by connecting the frequency valve directly to
a 12V (switched by the ignition) supply. Hey 100% duty cycle, I discovered
this "modification" when the frequency control valve went super nova.
As an interim solution I connected a couple of high power resistors to drop
the voltage down to 6 volts. On closer inspection of the ECU, I discovered
the original cause of the problem. A PCB trace from the large transistor
that drives the frequency valve was burned out. This is not surprising
since the frequency valve draws 2amps and the PCB traces are not
particularly wide, given time and a bit of electromigration and hey you've
got a fuse. (RDH insert comments on quality German electronics here!)
Anyway the moral is remove the ECU and examine the PCB carefully. It could
also be the connector to the ECU from the wiring loom.