Random Connection? Curious...... - Defender Source
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  #1  
Old April 13th, 2009, 09:53 AM
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Random Connection? Curious......

Hi,

I am the one that everyone just helped diagnose the check engine light. I was told how to read the code, understand the code, unplug the ECU, etc. Thanks!!!

When I was under my passenger seat - I noticed a connection that had been detached. It is a white square connection (see attached photo). Furthermore, one half of the connection has been covered with duct tape?? I doubt this is standard from the factory I am an original owner, yet I have no idea when this was done, or by who.

What does this connection do??? Just curious??

Flagg
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  #2  
Old April 13th, 2009, 10:29 PM
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Wow..........35 people looked at this tread, and no one knows what this plug is for?? Thanks for looking.............never thought I could have the experts at the D90 page at a loss

Flagg
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  #3  
Old April 13th, 2009, 10:36 PM
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Plug it in and see what happens
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  #4  
Old April 13th, 2009, 11:07 PM
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Flux Capacitor

Sorry I couldn't be of more help.
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  #5  
Old April 14th, 2009, 08:31 AM
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Chris Hinkle
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What are the color of the wires? You can normally figure it out from that and a wiring diagram.
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  #6  
Old April 14th, 2009, 08:52 AM
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There is one in every hotwire injection system that I have seen. It is a diagnostic plug of some sort.
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Old April 14th, 2009, 08:54 AM
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Ive got the same thing on my Classic and 90, your photo is a little fuzzy. I wonder if it could have something to do with the "tune resistor"? On the classic its a pretty long wire and has a little tag on it with some writing.
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Old April 14th, 2009, 09:34 AM
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David Marchand
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Quote:
Originally Posted by evilfij
Plug it in and see what happens
I can't believe you didn't suggest licking it while the key was in the ignition...
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  #9  
Old April 14th, 2009, 10:19 AM
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Robert Dassler
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It's the diagnostic plug for Testbook. The other half of the connector loops a groundwire back. If I recall correctly, by manipulating the key and plugging and unplugging the connector in sequence, you can manually read multiple codes in the 14CUX. I've never bothered to try since I have Testbook.
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  #10  
Old April 14th, 2009, 10:37 AM
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I'm sure it's a diagnostic plug. It looks identical to the plus on the ABS computer in a RRC. However in a RRC it's useful to get the computer to spit out ABS trouble codes. I doubt it's any use to you without testbook. All the info you'd need goes out to the display already.
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  #11  
Old April 14th, 2009, 10:59 AM
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Quote:
Originally Posted by Roadsiderob
It's the diagnostic plug for Testbook. The other half of the connector loops a groundwire back.
Rob is 100% correct.
It doesn't matter if it is plugged in or not for your trucks operation. I usually reconnect them after I am done with the Auto-Logic just for the sole reason of not having a loose connector for customers to ask questions about.
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  #12  
Old April 14th, 2009, 01:04 PM
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Hey,

Thanks everyone. It is good to learn what it is, and It is good to know that it does not matter if that is plugged in or not. Thanks to everyone on this page, for continuing to educate me about my truck!

Flagg
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  #13  
Old April 14th, 2009, 01:30 PM
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Quote:
Originally Posted by ECR
Rob is 100% correct.
It doesn't matter if it is plugged in or not for your trucks operation. I usually reconnect them after I am done with the Auto-Logic just for the sole reason of not having a loose connector for customers to ask questions about.

I used to think they plugged into where the code display was.
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