Oxygen Sensor Connector - Defender Source
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  #1  
Old September 18th, 2015, 12:57 PM
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Matthias Moran
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Oxygen Sensor Connector

From any 3.5/3.9/4.2 vehicle.
I only need the connector with a few inches (say 3 minimum) of wire.
If you were going to throw away your old sensors, please cut off a connector and send it to me instead. You'll be saving me a trip to the junk yard.

Will happily pay shipping plus say $20 ?

(I'm in San Francisco, CA)

Thanks
- Mat
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  #2  
Old September 18th, 2015, 01:47 PM
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Bill Adams
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Or cut both ends and fit up a new WeatherPack 3 way.
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  #3  
Old September 19th, 2015, 01:31 PM
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I can help you out with that, I've got some dead sensors. I'm in Lake county but away for the weekend, pm me your address and I'll get it on its way the first part of the week.
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  #4  
Old September 21st, 2015, 09:07 AM
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Samer Hijazi
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TigerDan: Since we're talking connectors, you wouldn't happen to have the 5-pin main connector for the main harness that feeds power to the ECU, would you? I'm looking for the male mating part. It's either black or white in color and the pins are arranged in 2 rows.
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  #5  
Old September 21st, 2015, 01:33 PM
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I'll take a look at a couple of scrap RRC wiring harnesses I have and see if they have the connector you're looking for. A pic might help though.
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  #6  
Old September 21st, 2015, 02:13 PM
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Great, thanks. Here is a picture of the plug (female end). Looking for the male end with as long a lead as you can manage (pigtails).
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  #7  
Old September 21st, 2015, 02:18 PM
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No, don't have any of those to spare...I use them to make Rovergauge/USB connector cables.
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  #8  
Old September 21st, 2015, 02:28 PM
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I must be confused then, as I assumed that this plug was the main feed to the EFI. It has 5 pins and they seem to be heavy gauge wires.

The plug you are referring to is Diagnostic Plug/Data Link Connector, and that's only a 3-pin plug. No? If not, what does the EFI Power Cable look like?
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  #9  
Old September 21st, 2015, 02:51 PM
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Those connectors are used in various places around the vehicle. The data connection for the ECU uses that style of connector, but only uses 3 of the 5 pins.

I really don't know what connector you're looking for...I'm not even sure that there is specifically an EFI power cable connector. I just dug out a couple of my harnesses for a better look, including my '94 D90 engine harness, and all that there is in the vicinity of the ECU connector are the relays for the fuel pump and ECU and their connectors, the diagnostic connector and in the case of the D90 harness, two yellow relays on their connectors. If you are looking for a connector that mates to one you pictured above, as I already stated, I don't have any available right now.
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  #10  
Old September 21st, 2015, 03:00 PM
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Fair enough. The harness you described sounds a lot like the one on my engine, and so does the diagnostics connector, so I'll leave that alone, especially if I decide to use Rover Gauge.

So, how does the EFI get power from the ignition switch and battery, etc then?
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  #11  
Old September 21st, 2015, 03:07 PM
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I'd have to look at a wiring diagram to see the exact path it takes, but it should be from a 12V source to the relay which is of course switched by the ignition, and from there to the ECU connector. Of the two metal-clad relays, the one with the blue connector is for the fuel pump and the black connector is the ECU relay.
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1994 RRC LWB
1994 RRC SWB
1995 D90 project
1961 SII
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  #12  
Old September 22nd, 2015, 10:11 AM
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Kevin Keith
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Quote:
Originally Posted by samer0214 View Post
So, how does the EFI get power from the ignition switch and battery, etc then?
Take a look at this pdf. It shows which pins the power & ignition are. And from the other thread, they both come in from that white connector.
http://p38arover.com/rover/p38a/Engi...UX_Systems.pdf
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