[urq] G'box numbers, Areial wiring and more
seiche at shadetreesoftware.com
Sun Jul 29 17:48:35 EDT 2007
Answers in text.
After a fairly long period without posting I now have four questions:
1. Aerial Wiring: I have been fortunate and obtained a fully working
original electric aerial for my WR. The wiring feed to it appears to be
a two-wire T-shaped connector with one spade connector set at 90 degrees
to the other. The top of the "T" is a red and black wire which appears
to be a permanent live (from where I am not absolutely sure but a
continuity check suggests it comes from the radio - but perhaps changes
colour on the way). The vertical of the "T" is a plain white wire which
definitely comes from the Radio and seems to be the "trigger" feed from
the radio (I know this because I have tested continuity of this to the
multi plug on the rear of the radio. (I call it "radio" but it is a
Blaupunkt CD & radio). When the t-connector is connected the aerial will
not lift or retract when the radio is switched on. Nor if the ignition
is switched on. Makes no difference.
If I touch the red/black wire on the "aerial" terminal for the white
wire, the aerial lifts. If I touch the red/black wire on both terminals
simultaneously, the aerial retracts. But if the two wires are connected
as they should be, nothing happens.
Does anyone know what is going on and how it should be wired and should
The body of the aerial must be grounded (earthed) to the chassis of the
car. There is a bracket with a bolt that secures that aerial to which
the internal electronics' ground (earth) is connected. Red is constant
power, white is the trigger (12V here raises the aerial, removal of 12V
causes the aerial to retract).
2. I have a spare ECU which has the pressure sensor outlet "stump"
broken off. Does anyone know a supplier of this sensor (transducer) and
if possible a part number or value/rating. Approx cost would be welcome too.
The pressure sensor is a 2 bar 0-5VDC absolute sensor that has been
obsolete for at least 11 years. Not to worry, spares from used ECUs
from people who have done swaps are fairly common. Alternately, you can
use a newer sensor, like that from one of the later 10Vt 200s (or 5000T
in the US). With these you need to adapt the MAP hose connection a bit
and provide 5VDC for the supply (just run a wire to a supply pin on a
chip or convenient trace) instead of the 8V input the original used.
3. Can anyone point me in the right direction for a chart or the like to
show how to identify the various ur quattro and coupe quattro gearboxes.
I have an 016 gearbox that came from a one owner from new 1986 coupe
quattro. I also have what I was told was an ur quattro 016 gearbox. In
almost all aspects they seem identical (only difference I have noticed
is one box has a switch in a different place where the other has a
blanking plug and vice versa. Is there any way to tell what boxes I
have, and what ratios they contain. I always believed the coupe quattro
was lower geared than the ur quattro to give it a bit better
accelleration with its lower powered engine. If true then it will be no
use in the ur quattro.
I know that the numbers on the top of the bell housing will tell you
when a box was made - i.e. 20106 is 20 October 1986 but I would like to
know more and ultimately confirm what I have in these two boxes.
The Family Album lists the transmission codes and what ratios, etc.,
that they have. The transmission code is a two or three character code
stamped on the bell housing/ Generally, the non turbo 016s had 4:11
final drive ratios, which will not work in an ur quattro (3:89 final
drive) unless you swap in the rear diff as well.
4. Finally, the sender that sits in the hole on the top of the bell
housing - that looks for the pins in the flywheel - how do you remove it
without breaking it. I have removed the cap screw and it is possible to
rotate it in either direction but I can't lift it out. Any good suggestions.
No good suggestions here other than a good soaking with penetrating oil.
I have never seen one that was that stuck.
I will be grateful for answers to any or all of the above questions and
will look forward to reading the.
I guess you can tell from the length of this email that there isn't much
to here because it's STILL RAINING here in sunny (a long time ago)
Have a look at the galleries attached to these links if your interested.
We have had a bit of bad weather here recently to say the least.
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