Baldy Mark Posted April 10, 2014 Author Share Posted April 10, 2014 Hi GW8IZRHere is couple of photo's for you Quote Link to comment Share on other sites More sharing options...
western Posted April 10, 2014 Share Posted April 10, 2014 the wiring connections look correct to me, have you done a continuity check on each of the wires ? to see if they are not broken. Quote Link to comment Share on other sites More sharing options...
Baldy Mark Posted April 10, 2014 Author Share Posted April 10, 2014 Hi western Not sure mate? Just what you & GW8IZR have been recomending, if you have a look at some of the previous posts you will see all the checks & results! that i have carried out! Quote Link to comment Share on other sites More sharing options...
Baldy Mark Posted April 14, 2014 Author Share Posted April 14, 2014 Hi GW8IZR did you manage to compare my gauge readings with yours? Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 14, 2014 Share Posted April 14, 2014 No sorry Mark, got involved in something else. I should find time over the Easter break. Did you try the temporary 0v connection to the gauge body? Regards Paul Quote Link to comment Share on other sites More sharing options...
Baldy Mark Posted April 15, 2014 Author Share Posted April 15, 2014 Hi GW8IZR I have tried a temporary earth on the fuel gauge but stil the same the needle stays at the full mark! Quote Link to comment Share on other sites More sharing options...
Baldy Mark Posted April 16, 2014 Author Share Posted April 16, 2014 Hi All had another go at the gauges! Connected a seprate earth! When i connect the 12v feed to the gauge & test it with my test light! the test light lights up! But when i connect the test light to the other terminal to check for a feed passing through the gauge! The test light dose'nt light up! But the gauge starts to reads full? I would have thought the test light would still have lit up as there is a feed passing through it? Quote Link to comment Share on other sites More sharing options...
Tetsu0san Posted April 17, 2014 Share Posted April 17, 2014 I have a fairly unmolested B reg 110, would it be helpful if I took a picture of the wires in the back of my cluster? I fitted a Discovery 200Tdi a while ago and apart from the temp gauge reading higher because of the Discovery sender all the dials work OK. Let me know if you want a pic. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 17, 2014 Share Posted April 17, 2014 I have a fairly unmolested B reg 110, would it be helpful if I took a picture of the wires in the back of my cluster? I fitted a Discovery 200Tdi a while ago and apart from the temp gauge reading higher because of the Discovery sender all the dials work OK. Let me know if you want a pic. A photo would be useful as I still have a suspicion that the feed and sender wires may be reversed but till I pull my dash off this weekend I can't check for Mark. Quote Link to comment Share on other sites More sharing options...
western Posted April 17, 2014 Share Posted April 17, 2014 IIRC the 12v feed terminal is marked with a + next to the rivet securing the terminal to gauge & the 2 terminals are different, one male, one female. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 17, 2014 Share Posted April 17, 2014 Thanks Ralph, having lived and breathed this albeit by remote diagnostic I can only conclude that the instruments are both faulty even though that seems so unlikely in the circumstances. Anyway a picture would help a bit and I'll take my dash out this weekend. Quote Link to comment Share on other sites More sharing options...
western Posted April 17, 2014 Share Posted April 17, 2014 I thinking the gauges may be the problem too, a comparison with your gauge wiring would elimnate the wiring fualt if there is one, I swapped out my old gauges for td5 ones a few years ago. Quote Link to comment Share on other sites More sharing options...
Tetsu0san Posted April 18, 2014 Share Posted April 18, 2014 Some pics: Looks like you have a feed to both and they earth through the sender, either temperature or fuel. On mine I have the main positive going into the fuel gauge and this branches off to the temperature gauge. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 18, 2014 Share Posted April 18, 2014 Its always hard looking at pictures to decide on what's connected to what but your picture looks like the sender connections are nearest the illumination (dial lamp) holder whereas in Marks picture that looks to be the opposite- it might be my eyes and this small Android screen but worth a check. Quote Link to comment Share on other sites More sharing options...
Tetsu0san Posted April 18, 2014 Share Posted April 18, 2014 I think you are right, the senders are on the bulb side and the feed is on the opposite side. And I did get it wrong though, the main feed is into the temp gauge first, not the fuel gauge. Not that this should matter either way. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 18, 2014 Share Posted April 18, 2014 On the discovery gauge on the bench here there is a resistor from one terminal to ground so even though it works both ways round the reading is different depending which way its connected - now I don't know if the defender gauge is the same but if I get ten minutes in daylight tomorrow with a meter might tell us something. Got a ford 4600 cab to put back on tomorrow and the dash wiring wasn't disconnected when it was lifted off so a bit of wiring to sort. Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted April 22, 2014 Share Posted April 22, 2014 So I got round to measuring the temperature gauge on my 90. So the open circuit voltage to the temp sender is 10.2V - so it is regulated. Yours measured 12.6V which suggests the regulator in the gauge is not working, either faulty or not wired correctly. Looking at a scrap discovery temp gauge (which may be similar to a defender) there is a zenner diode stabliser with a 56R series element. Substituting a resistor to -Ve to simulate the sender getting hot, mid scale (N) needed about 30R and the voltage was 5V Hot was about 10R resulting in 4V - now those measurements were done quite quickly so +/- a bit! That suggests to me that the reasons your gauges no longer work are: 1 - gauge -Ve connection missing ( you have tested that and the results suggest that it is ok ) 2 - possibly gauge input and output have been reversed ( photographs suggest this may be case but its not clear and may not cause the symptoms ) 3 - both gauges are stuffed now ( frustrating and unlikely ) Quote Link to comment Share on other sites More sharing options...
Screema Posted July 27, 2014 Share Posted July 27, 2014 Anyone found the light in this tunnel?? I have the same problem http://i46.photobucket.com/albums/f113/Mike_Newson/Mobile%20Uploads/2014-07/C7042F7F-B094-4472-8BDC-1F5917FDC393_zpsob5skyyf.jpg Quote Link to comment Share on other sites More sharing options...
Baldy Mark Posted July 29, 2014 Author Share Posted July 29, 2014 Hi All Sorry not been in touch for a while regarding this issue! Fuel & temp gauges are still reading high! I know somebody that has got a set of gauges at the back of their garage & has been claiming to dig them out for weeks now! but they cant get to them just now? So i have just been trying to make sure that if i need to use the Landy more than i normally do i stick an extra £10 in & besides i've got other jobs needing to be done that i was spending to much time on them. Quote Link to comment Share on other sites More sharing options...
Screema Posted July 30, 2014 Share Posted July 30, 2014 yeah I have a few things to do too, the reason I'm in this mess is because the bulbs in the dash packed up so I was replacing them - now I get to see my gauges just not really any point though! I'll let you know if I work it out Quote Link to comment Share on other sites More sharing options...
Screema Posted July 31, 2014 Share Posted July 31, 2014 Hi Mark I think I have a different problem, my fuel gauge is broken, will let you know how I get on when the replacement arrives Quote Link to comment Share on other sites More sharing options...
GW8IZR Posted August 1, 2014 Share Posted August 1, 2014 Hi Mark I think I have a different problem, my fuel gauge is broken, will let you know how I get on when the replacement arrives If its only the resistor that is broken its a very simple repair. Quote Link to comment Share on other sites More sharing options...
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