Wire mystery?

D

DJ 190

A2OC Donor
Yesterday, I change the starter motor on my A2. After fitting, I noticed a wire with a tag at the end was unconnected. It's white with a green stripe.
This wire :-

wire Audi 001 (Small).JPG


I still can't figure out exactly where it goes? When the car's running I get the warning message : Low oil pressure STOP!
So I'd like to know exactly where the wire/tag locates, please? Thanks

David
 
It goes into that connector that is litterally behind the wire in the photo, looks like it's pulled out of the connector body

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Looks like it’s come out of the pressure switch plug.
There’s nothing on the end of it in the photo.
 
Yes, but I can't seem to see HOW it is inserted into that plug? (I did try pushing it into the inner, top hole, but it didn't seem to insert). Is it from the top? A photo taken from a members diesel A2, showing the wire in place, would be great!

David
 
The black plastic outer visible in situ that the wire should be secured within at the right hand end should unclip from the sensor body. Have a look at the following image collection - in situ with wire in place, and then the sensors on their own without the socket latched on.

How the wire itself is secured within the housing is not something I know though - someone a bit more competent should be able to tell you how to put the two together.

 
I work with these connectors all the time at work. You need to remove the black plastic connector housing from the oil pressure sensor by pushing the whole connector into the sensor while pressing the release tab then pulling it back out while still holding the release tab.

Then once you've removed the connector housing you need to align the anti back out tabs on the metal crimped terminal with their corresponding slots in the connector housing then push it into the black connector until it clicks

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I forgot you'll need to remove the anti back out clip, reinstall the terminal then put the anti back out clip back in.

This does a much better job of explaining


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Robin_Cox said:
The black plastic outer visible in situ that the wire should be secured within at the right hand end should unclip from the sensor body. Have a look at the following image collection - in situ with wire in place, and then the sensors on their own without the socket latched on.

How the wire itself is secured within the housing is not something I know though - someone a bit more competent should be able to tell you how to put the two together.

Click to expand...
The very first picture shows the pressure switch and the wire going in to the hole at the end. So at least I know where the wire is to be inserted! Now if it obviously just pulled out, then why shouldn't it re-insert? I've read what you've said regarding removing the pressure switch outer/end housing. That may make it easier to get the wire'tag back in place. I'll have a go, soon, and see how it goes ....

David
 
Links from @Halduck above are very useful. One thing I would say from the pressure switch (identical) on our AUA engine (it is located in a different place but looks the same) is that the single wire going into the plug looks very feeble, and when the OPS membrane fails, it is through the hole around the wire in the back of the plug that the oil dribbles. If the connector has disintegrated inside where the wee back-out tabs are supposed to hold the connector in so the wire could come loose with normal vibrations and pulling, then you may need a new connector body to refit the wire / pin into, fortunately these are easy to get hold of being common to many VAG vehicles.

Need to check, but I think the 1-pin socket is the following- you can get this pre-wired as a 'pig-tail' that you could splice in to replace if your connector pinning skills are as rudimentary as mine are, or otherwise as the plug body with seals and so on.

1J0 973 701 oil pressure switch connector
ie -
 
O.K., thanks for all your help! It's re-connected and all is well! I first removed the black plastic connector housing, as outlined in thread #7 . I then cut off the terminal with ~3 cm of wire attached. I could then see with an eye-glass just what was required. The spade of the terminal must be correctly orientated before insertion : horizontal. There is no trouble in inserting a terminal, only when having to remove one. I just bent-up the side "barbs" to ensure that the terminal would be retained after insertion. It need a reasonable push with a small screwdriver to get it fully in. Then I joined and re-soldered the wire and insulated everything. A test run and success! Great!

David
 
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