MC turbo sensor cables / plugs

[Todd Phenneger]

Elliot,
  Sorry this reply is so late.  I JUST read the message.  But to
answer your question, The brown wire is VERY important.  I had
to re-spice two of mine.  It is the ground for the sensor but
also serves as a magnetic shield around the signal wires to
minimize interference.  My wires where corroded or broken where
they attach to the shielding.  I had to strip the brown wire
backa  little, then re-crimped the metal crimp ring over the
coax cable with the newly stripped wire in its groove on the
metal ring.  Clean up any corrosion and you will see how the
brown wire attaches to the shielding ring.  Its sort of like
crimping a Coax TV Connector. same principle at least.
  Good luck
     Todd

--- veetesse <veetesse at hotmail.com> wrote:
>
> Hello all...
>
> Still tracking down the intermittent no start on the 4ktq...
> I've replaced
> the crank sensors with two sets of spares I had....No change,
> so I began
> looking at the wiring.
>
> I was checking out the wire connections for the reference /
> speed sensor
> plugs on the car (MC turbo engine with the Mac 11 ECU and
> wiring) and
> noticed that in the cable from each sensor there are three
> smaller wires
> that correspond to the three pins in the connector.
>
> There's a black wire, a yellow wire and a brown wire.  The
> brown wire
> appears to be connected to some kind of shielded ring around
> the base of the
> plug end or possibly to some sort of braided inner sheath
> (like coax?).
> Does anyone know if this is the case or what the purpose of
> the brown wire
> is?
>
> The reason I ask is that it appears that one of the wires is
> on the verge of
> breaking near the plug connector on the ECU side (!) and will
> need repair or
> replacement... The wire seems to be frayed right where it
> connects to the
> pin on the female plug end.
>
> So the question is, do I try to splice a new end on the cable?
> If so, what
> do I splice the brown wire to?
>
> Is it maybe possible to replace just these cables in the
> harness back to the
> ECU with spares from another car?  I read in the archives that
> separate pins
> (the gold plated ones) might be available from the dealer for
> these types of
> plugs.
>
> Any possible solutions besides replacing the entire harness?
>
> Thanks in advance.
>
> Elliott Bavely
>
> 86 4ktq
> 85 4kq
> 81 Coupe ITB
> 83 GTI FSP, 83 GTI 16V
> 90 VW Cabriolet


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