Any ideas what this wire is please

1. 
   Inkjets1Member
   Hi all,
   Appoligies if I have this question in the wrong.thread, hopefully it's.ok.
   I have a yellow and black wire coming up from the loom that connects to the EMC, but it's connected to anything and just.has a spade connector on with another.one spliced into it.
   It's.a long.shot, but does anyone.know what.it is or.where it should be plugged into. I can't get my AC to start when switched on and wondered if it's anything to do with that.
   Done a Hawkeye check, no errors, a.c. clutch clicks.on when doing that test and fan starts when a.c. is turned on.
   
   
   
   
   Today at 4:25 PMEditReport
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2. 
   Inkjets1Member
   Sorry, it's a discovery 2 TD5 1998
   
   Today at 4:26 PMEditReport
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3. 
   Trench RatWell-Known Member
   Post in the discovery section
   
   Today at 4:35 PMReport
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4. 
   marjonWell-Known Member
   Yep wrong section but hey ho
   
   All I can say is that looks like a PO bodge, where does it go might give you an idea.
   
   J
   
   Today at 4:36 PMReport
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5. 
   JohnM70It's a V6 you know...LZIR Despatch Agent
   Copper?
   
   33 minutes agoReport
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6. 
   Inkjets1Member
   Cheer for the reply and sorry for being in the wrong thread, I'll try to post it across when I'm o my.pc which is easier than the phone.
   PO bodge ? Not sure what the po is but get the idea about being some sort of budge.
   Yea, it is copper. Seems to disappear into some loom.
   Maybe get the metre on it to see if there is any live feed etc... Thanks for the replies tho chaps, greatly appreciated
   
   A moment agoEditReport
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Well, that's one way to move a question

not too sure how that happened.... at least it's.done now

Hi, as i can see that wire is rather black/yellow than yellow/black and the only B/Y wires conncted to the ECM are for the glow plug warning light and TPS sensor earth, there is no Y/B wire to the ECM. For the AC you must make sure it's not low on gas first of all cos then the compressor clutch is disabled by the dual pressure switch

Thanks sierrafery , Thanks for your reply and help,
I think it may possibly be to do with the TPS as you mentioned as a earth. It kind of looks like someone had added a spade connector to it, as if they were going to put it on a earth point / connection somewhere and its snapped off (probably with wear and tear).
I think the grey plug part is probably an original connector but cant see anywhere it would plug into unless its underneath the fuse box under the bonnet somewhere, which again makes me wonder if its come unclipped and rather than someone remove loads of bits to reconnect it, they have just spliced a spade connector onto it and earthed it that way.
The throttle seems to be working ok tho, at times when the engine is cold, its a bit like kangaroo deiseal in the tank when your just feather the throttle, but that goes when you give it a bit more acceleration.
I'm in two minds to maybe just tape it up and leave it, or if I should try and earth it to the bodywork somewhere to see if anything happens.
I didn't think it was the AC. Everything on that appears to work (except it doesn't turn on unless you squeeze the relay to engage the compressor clutch or use the Hawkeye to do the same), so I am guessing the pressure is the most likely fault there.
I think when I had it re-gassed, it did seem a bit odd it didn't work and the garage told me to get their 'mate' in the auto electrics garage to do a electrical fault find to sort it. Then told me I couldn't wait in the garage whilst he did this, but a re-gas of the system would be free if I needed it topping up afterwards.
Just through curiosity, where is the pressure switch for it, I have looked everywhere, behind the front grill, under the bumper at the front, behind the lights and I cant see anything that looks like a sensor anywhere. The only one I could find was a sensor on the round cylinder behind the grill which I think is the condenser, so guess its not that.
Don't you just love these little beasts.... as quick as you solve one puzzle, they taunt you with another

The dual pressure switch is screwed into the top of the receiver/dryer(that cylinder behind the grill), this one has a YB wire connected to it but it's coming from a connector which is under the dash not from the ECM also the TPS earth on BY wire is an output from the ECU black plug to the TPS going also to a header which is under the dash above the pedals... try to trace where that wire ends and tell me then i'll tell you more

brill, thanks sierrafery
At least I know where the ac sensor is. I did wonder if it was that one. If I unscrew it, and replace the sensor, would that discharge any gas in the ac system?

Secondly, I can now try and chase the other BY wire I posted in the image. That does look like its coming (or had come from the ECU, I think it still does connect to the ECU and looks like someone has spliced into it for what ever reason.

Looks like 2 separate issues I have if that makes sense. But if you know about the AC sensor and if I can unscrew that without getting gas etc spilling everywhere, I can easily change that tomorrow with a new one.

The other wire (as in pic) I will try and trace back and let you know when I find where it seems to go...
Thanks a million

If you unscrew the sensor you'll loose the gas so unplug it and bridge the terminals in the connector then see if the compressor kicks in or not, if it does and you are 100% certain that the pressure in the system is OK then you'll have to replace the switch so better check the pressure first cos if the switch is gone you'll have to empty the system then regas it but in that case they should not charge you for the price of gas again.

Ok thanks,
I.have tried bridging the connectors, so I'm guessing they havnt put the right pressure in.
Maybe why I was told to pit it in his mates garage for a electrical test but didn't want me about whilst they did it and said they would 're gas it for free. I might be being sinical, but that would make some sense.
Otherwise, why would the a.c. radiators place say they would 're gas it again for free after I had their neighbouring garage charge me for a full electrical diagnostic, plus tell me they could fix it in a few hours without me waiting about to watch
Thanks for getting back so.quickly. I think I will get my new land rover chap to check the pressure first now....

Halfords sell a re-gas kit you can do yourself, two parts, one is a combined gauge and gun which connects to the other part, the green cylinder, and obiously to the low pressure connector on your air con. I have used this kit on both D1 and D2, works a dream as long as you remember to shake the cylinder like mad then keep it turned upside down when filling, (ensures plenty of sealant goes in with the gas). Cheaper and better than getting some garage to do it without you watching, and once you've got the gun and gauge, you only have to return the cylinder and pick up a refill, when you need one. That way you can use the gauge to tell you if you need more gas without paying someone every time.
By the way, do you have towbar electrics and if so how many plugs and do they both work?
Only asking cos I also found extraneous wires on my D2 when I bought it and finally sussed they were disconnected but meant to go to a second plug at the rear probably to charge a hobby battery, or whatever they are called. Faitn chance of that with yours? Must admit does not really look like it.