jibbyman Posted September 19, 2012 Share Posted September 19, 2012 Hi all , if I turn my fan on full blast after about 5 miniutes the green lights come on "hot or cold" .I have replaced the battery and tested the alternator and they seem fine Discovery 2001 td5 auto thanks steve . Quote Link to comment Share on other sites More sharing options...
dave88sw Posted September 20, 2012 Share Posted September 20, 2012 Common fault, its the xyz (gearbox position) switch on the side of the gearbox, the air con system creates condensation when in use which drains through two little tubes under the car on the trans tunnel, one of these tubes is directly above the switch so the switch gets wet and it doesnt like it. Get under the car and lengthen the pipe with some suitable hose stuffed into the drain tube and you should never have the problem again, but do it soon before the switch becomes permanently damaged. Quote Link to comment Share on other sites More sharing options...
jibbyman Posted September 21, 2012 Author Share Posted September 21, 2012 Thanks Dave will do this .do the tubes leak moisture when the heating is on hot . Quote Link to comment Share on other sites More sharing options...
dave88sw Posted September 25, 2012 Share Posted September 25, 2012 The heater also uses air conditioning as it dries out the air, this clears the windows much quicker so yes, you're likely to get condensation drained even with the heater on. Quote Link to comment Share on other sites More sharing options...
DiscoHere Posted September 27, 2012 Share Posted September 27, 2012 As a matter of curiosity would it happen if the economy mode was selected on the heater? Hugh Quote Link to comment Share on other sites More sharing options...
dave88sw Posted September 28, 2012 Share Posted September 28, 2012 It shouldn't do as the economy mode switches off the air con Quote Link to comment Share on other sites More sharing options...
sierrafery Posted September 29, 2012 Share Posted September 29, 2012 the most certain answer will be revealed if you read the fault codes... The XYZ switch is the most common issue but those lights could have at least 15 other reasons, here is for the most obvious http://www.landrover..._860403nasf.pdf Quote Link to comment Share on other sites More sharing options...
Orgasmic Farmer Posted September 29, 2012 Share Posted September 29, 2012 Agree. Mine have been playing up so i removed the XYZ switch, took it apart and gave it a good clean. There was no obvious water ingress but 1 of the contacts did look dirty so I cleaned it up and bolted it back together. When i went to test it the battery was flat (truck has been parked up for 4 weeks). I used my boost starter to fire it up but was dissappointed to see the lights were still there. Anyway, I read somewhere that these MS lights can also be caused by poor charging issues so I waited until the battery was fully charged and hey presto... no more M&S lights! Trouble is now I don't know whether I fixed the issue by cleaning the switch or whether I have had charging issues all along! Me thinks i need to read the codes some time soon. Quote Link to comment Share on other sites More sharing options...
strong1 Posted December 13, 2015 Share Posted December 13, 2015 I agree that is the problem, I made a short video while I was sorting out the xyz switch so that you can see where the air con drips water on the switch. The two green lights come on as you say called M&S and the auto box goes into limp home mode. The connector can go rusty as well from the water. Every time I go through reverse on the auto box the dreaded green lights come on. I got under the Discovery with a micro camera and filmed up inside the body while filming and watching the laptop picture. If you put the front wipers on and put the auto box into reverse, the rear wiper should come on if the circuit is working as it receives a signal via the ECU and BCU. Watch the video here. Quote Link to comment Share on other sites More sharing options...
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