OBD2 wires question - for electrical schema reader

[Stormy_be]

Hello,

I still need to get the wires for my OBD2-connection. + speed/rpm wires.
1) what wires are connected to the OBD2-D-socket under the dash?
2) what are the colours of the speed and RPM wires going to the normal dash cluster.

I am no good in ready electronics schema's.
So I really need help with this one.

I really need to know the colours of the cables, not only which pin at the dash side.
Because I don't have the dash connected any more. No more cables in the cabin.
I only have a bunch of cables coming through the bulkhead (from engine compartment to the interior)

I have an OBD2-interface-cable that is connected to my dash, but need to know the wires from the "car-side" still.
The RPM and Speed wires i something I was adviced to take from the speedo, directly to the new digital-dash-cluster because taking the input from the OBD2 would have too much delay in it.

Thanks in advance,
Koen

 

[Stormy_be]

This is the only wiring in the car for now.
So the OBD and the wires to the normal dash should be in here...somewhere...
Who can help??

 

[hard top]

Doctor Spock ?

 

[Stormy_be]

Only what is really needed remains

 

[Stormy_be]

So nobody who knows where the OBD2 wires come from?
Or the colour code of the rev-wire going to the tacho?

 

[pgunter]

@Stormy_be I hope this might help you .. you will find the OBD2 wires and the colour codes if you can work out electrical diagrams.

http://wedophones.com/Manuals/BMW/1996 BMW Z3 Roadster Electrical Troubleshooting Manual.pdf

Hope it helps you a lot. It did when I was working out my fuse issue.

 

[Stormy_be]

@Stormy_be I hope this might help you .. you will find the OBD2 wires and the colour codes if you can work out electrical diagrams.

http://wedophones.com/Manuals/BMW/1996 BMW Z3 Roadster Electrical Troubleshooting Manual.pdf

Hope it helps you a lot. It did when I was working out my fuse issue.

I'm no master of these electrical schema's :-(

 

[pgunter]

OK Koen, is it just the wires you need to identify to go in which plug of the rectangular port under the steering column ?

 

[Stormy_be]

I only have a couple of wire coming through the bulkhead (as on the picture above).
I would need to know which colours are supposed to connect to the OBD-plug, or where they come from so that I could trace them.
From the OBD-plug I have a special connector made by the dash-company. So, that is ok.

 

[Stormy_be]

I think the OBD-coonector would only have 4 wires:
4&5 ground
16 power
and pin 7 signal.
But where do I get the signal from.

I think (but as I said, I'm not good in these schema's) it is a 0.5mm WS/VI wire on the ECU pin 88
But not sure at all.

And engine speed (RPM) should be black 0.5mm pin 80 from the ECU...not sure about that one either