JST Posted May 2, 2006 Share Posted May 2, 2006 i have one of the black 300tdi expansion tanks fitted. it has the std cap. Do discos/rangies with this tank fitted have low coolant wng levels fitted? if so does anyone know the part numbers for the caps as fitted to Discos/Rangies i presume that have a sensor fitted to them? presuming they exist? i was then thinking of replacing my cap wth one of those then wiring it through a wng light on the dash to come on when the level is low. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 2, 2006 Share Posted May 2, 2006 i have one of the black 300tdi expansion tanks fitted. it has the std cap.Do discos/rangies with this tank fitted have low coolant wng levels fitted? if so does anyone know the part numbers for the caps as fitted to Discos/Rangies i presume that have a sensor fitted to them? presuming they exist? i was then thinking of replacing my cap wth one of those then wiring it through a wng light on the dash to come on when the level is low. When you sort the wiring out.Please let me know how you managed it???.I've been trying for three months now and I'm no further forward. I eat rat poison mike I can cause trouble in an empty house !!! Quote Link to comment Share on other sites More sharing options...
SiWhite Posted May 2, 2006 Share Posted May 2, 2006 I've been meaning to do this mod for ages. I've got an old copy of the Shire LRC mag with part numbers and a great wiring diagram at home - I'll scan it if someone from Shires lets me! Quote Link to comment Share on other sites More sharing options...
will_warne Posted May 2, 2006 Share Posted May 2, 2006 I've been meaning to do this mod for ages.I've got an old copy of the Shire LRC mag with part numbers and a great wiring diagram at home - I'll scan it if someone from Shires lets me! No problem, just credit the author. Quote Link to comment Share on other sites More sharing options...
JST Posted May 2, 2006 Author Share Posted May 2, 2006 Si - your engine loosing a coolant pipe on the wales trip is one of my driving factors! Quote Link to comment Share on other sites More sharing options...
western Posted May 2, 2006 Share Posted May 2, 2006 i have one of the black 300tdi expansion tanks fitted. it has the std cap.Do discos/rangies with this tank fitted have low coolant wng levels fitted? if so does anyone know the part numbers for the caps as fitted to Discos/Rangies i presume that have a sensor fitted to them? presuming they exist? i was then thinking of replacing my cap wth one of those then wiring it through a wng light on the dash to come on when the level is low. Disc 300Tdi's have this cap NTC7161 which is exactly the same for a 200/300Tdi Defenders, what you want is this from Range Rover Classic From VIN GA399973 cap/sensor low level coolant PRC7925, it's just possible to see the 2 spade connectors on top of the cap should think with just 2 spade connectors one would be power & other a signal to a warning light [haven't found any wiring diagram showing this yet] Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 2, 2006 Share Posted May 2, 2006 The coolant level indicator bit into the header tank is simple. It's the electronices that are needed to change the switch over to work the warning light. As yet I haven't managed to identify those bits. I do have some information using a change over relay but as yet I can't get that to work. I eat rat poison mike I can cause trouble in an empty house !!! Quote Link to comment Share on other sites More sharing options...
GBMUD Posted May 2, 2006 Share Posted May 2, 2006 So, are the sensor contacts closed when the coolant level is OK and open when the level is low? Chris Quote Link to comment Share on other sites More sharing options...
Fatboy Posted May 2, 2006 Share Posted May 2, 2006 Well if you pull the wires off, the light is on. If the level is low, the plunger drops and the light comes on. I've got one on the LSE and bought a new one last year because I thought mine was faulty.. about £35? Quote Link to comment Share on other sites More sharing options...
Edd Posted May 2, 2006 Share Posted May 2, 2006 More info here ep90.com Quote Link to comment Share on other sites More sharing options...
BogMonster Posted May 3, 2006 Share Posted May 3, 2006 I have seen a couple of RRs here which have had this taken off on the basis that it was a bit like 300Tdi oil pressure senders - i.e. the function of the warning light was to indicate that the sender was buggered and nothing else A good idea if it worked though Quote Link to comment Share on other sites More sharing options...
Fatboy Posted May 3, 2006 Share Posted May 3, 2006 I have seen a couple of RRs here which have had this taken off on the basis that it was a bit like 300Tdi oil pressure senders - i.e. the function of the warning light was to indicate that the sender was buggered and nothing else A good idea if it worked though I was a believer of that theory until last year... I'd even had an oil light come on at 60mph and it was because of a knackered sender. However, one of the little water hoses on the Rangie failed last year late at night as we were coming up the A90 in foul weather - sure enough, no water in the header tank. I topped it up with water / antifreeze from a container in the boot and carried on only to get the light come back on 5mins later. The second time I was sceptical and looked for the leak "lo and behold!" The point is that I would have been none the wiser until the temp guage had moved without the little light so it potentially saved the 4.2 from a roasting Quote Link to comment Share on other sites More sharing options...
MogLite Posted May 3, 2006 Share Posted May 3, 2006 More info hereep90.com The relay that Dave quotes can be found in a RRC, not exactly sure where - but looks like this Quote Link to comment Share on other sites More sharing options...
BogMonster Posted May 3, 2006 Share Posted May 3, 2006 I was a believer of that theory until last year... I'd even had an oil light come on at 60mph and it was because of a knackered sender. However, one of the little water hoses on the Rangie failed last year late at night as we were coming up the A90 in foul weather - sure enough, no water in the header tank. I topped it up with water / antifreeze from a container in the boot and carried on only to get the light come back on 5mins later. The second time I was sceptical and looked for the leak "lo and behold!"The point is that I would have been none the wiser until the temp guage had moved without the little light so it potentially saved the 4.2 from a roasting Sorry - I am just a pessimist about "warning systems" having had about six oil pressure senders in my 90 in the last 18 months..... It is a good idea if it works and I suppose you could argue that, like a radar detector, a hundred false alarms are worthwhile if it goes off the one time it really needs to... Quote Link to comment Share on other sites More sharing options...
geoffbeaumont Posted May 3, 2006 Share Posted May 3, 2006 Sorry - I am just a pessimist about "warning systems" having had about six oil pressure senders in my 90 in the last 18 months.....It is a good idea if it works and I suppose you could argue that, like a radar detector, a hundred false alarms are worthwhile if it goes off the one time it really needs to... Having had a few coolant leaks from the Rangie, those sensors are a Very Good Thing... Quote Link to comment Share on other sites More sharing options...
Fatboy Posted May 3, 2006 Share Posted May 3, 2006 It is a good idea if it works and I suppose you could argue that, like a radar detector, a hundred false alarms are worthwhile if it goes off the one time it really needs to... Ah.. oh.. I think Radar Detectors are a waste of time. They either detect the wrong thing or miss the right thing (narrow beams etc). They give a very false sense of security IMHO. My money would be on a Road Angel which can be updated via the internet, knows where all of the sytems are and is very reliable. Quote Link to comment Share on other sites More sharing options...
scotm Posted May 3, 2006 Share Posted May 3, 2006 As longterm lurker when i saw this response I had to register and reply. I have just fitted one to my defender and got it working successfully (eventually). I followed the ep90.com instructions but couldn't get the light to work when connected through the sensor. After consulting a friendly electronics hobbyist we came to the conclusion that the relay recommended on ep90 required more current than could flow through the sensors reed switch. I changed the relay for a 12v telecoms one (these have much higher coil resistance so need less current) from Maplin part number N17AW and bingo it worked. (This relay requires soldering at the terminals) RSS do similar relays part numbers 422-7079 and FP2-D3002. Quote Link to comment Share on other sites More sharing options...
BogMonster Posted May 3, 2006 Share Posted May 3, 2006 Ah.. oh.. I think Radar Detectors are a waste of time. They either detect the wrong thing or miss the right thing (narrow beams etc). They give a very false sense of security IMHO. My money would be on a Road Angel which can be updated via the internet, knows where all of the sytems are and is very reliable. I do too. They definitely haven't saved me a big fine on two occasions and therefore they definitely don't work. I just keep one for decoration really, stops the dashboard getting dusty, honest ossifer Quote Link to comment Share on other sites More sharing options...
Fatboy Posted May 3, 2006 Share Posted May 3, 2006 I do too. They definitely haven't saved me a big fine on two occasions and therefore they definitely don't work. I just keep one for decoration really, stops the dashboard getting dusty, honest ossifer Steve, I use mine purely as a backup to confirm my speed using the GPS... I didn't get mine because I had been caught and pay no attention to it when it bleeps... Neither do I religiously update it before long journeys. Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 3, 2006 Share Posted May 3, 2006 As longterm lurker when i saw this response I had to register and reply.I have just fitted one to my defender and got it working successfully (eventually). I followed the ep90.com instructions but couldn't get the light to work when connected through the sensor. After consulting a friendly electronics hobbyist we came to the conclusion that the relay recommended on ep90 required more current than could flow through the sensors reed switch. I changed the relay for a 12v telecoms one (these have much higher coil resistance so need less current) from Maplin part number N17AW and bingo it worked. (This relay requires soldering at the terminals) RSS do similar relays part numbers 422-7079 and FP2-D3002. Any chanco of any instructions please ?? You know what wire goes to what connector. I eat rat poison mike I can cause trouble in an empty house !!! Quote Link to comment Share on other sites More sharing options...
JST Posted May 3, 2006 Author Share Posted May 3, 2006 cheers for the input guys, time to do some investigating of prices i think. Quote Link to comment Share on other sites More sharing options...
scotm Posted May 4, 2006 Share Posted May 4, 2006 Pin Connections for the Maplin N17AW relay: Relay Coil Pin 1 - Ignition Feed Pin 16 - Coolant Sensor (The coolant sensor then goes to earth) Relay Contacts: Pin 4 - Ignition Feed Pin 6 - Warning Light (Then warning light goes to earth) (You can also use pins 13,11 instead of 4,6) There is a pdf datasheet on the maplin website with the pin details N17AW Relay Hope this helps Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 4, 2006 Share Posted May 4, 2006 Pin Connections for the Maplin N17AW relay:Relay Coil Pin 1 - Ignition Feed Pin 16 - Coolant Sensor (The coolant sensor then goes to earth) Relay Contacts: Pin 4 - Ignition Feed Pin 6 - Warning Light (Then warning light goes to earth) (You can also use pins 13,11 instead of 4,6) There is a pdf datasheet on the maplin website with the pin details N17AW Relay Hope this helps Thanks a lot. A visit to Maplins today then have a play with the relay. I eat rat poison mike I can cause trouble in an empty house !!! Quote Link to comment Share on other sites More sharing options...
mmgemini Posted May 4, 2006 Share Posted May 4, 2006 I can't get the PDF to open. Could you post the pin details please. I eat rat poison mike I can cause trouble in an empty house !!! Quote Link to comment Share on other sites More sharing options...
Edd Posted May 4, 2006 Share Posted May 4, 2006 Could you post the pin details please. He did!!! Pin Connections for the Maplin N17AW relay:Relay Coil Pin 1 - Ignition Feed Pin 16 - Coolant Sensor (The coolant sensor then goes to earth) Relay Contacts: Pin 4 - Ignition Feed Pin 6 - Warning Light (Then warning light goes to earth) (You can also use pins 13,11 instead of 4,6) Quote Link to comment Share on other sites More sharing options...
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