1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.
  2. Welcome To LandyZone!

    LandyZone is the biggest Land Rover forum on the net. We have plenty of very knowledgable members so if you have any questions about your Land Rover or just want to connect with other Landy owners, you're in the right place.

    Registering is free and easy just click here, we hope to see you on the forums soon!

Getting Temp Gauge to read Correctly

Discussion in 'Series Land Rovers' started by Rodeo Joe, Apr 28, 2020.

< Previous Thread | Next Thread >
  1. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Got a 2.5 n/a in a series 3......actually got 2 but one the temp gauge reads right the other one doesn't.
    I saw a post a while back saying there was a resistor you can get to convert it, I think it might have been by JamesMartin but I can't find it any more. Anybody know about this.....don't know how to do the hashtag thing.
     
  2. Hicap phill

    Hicap phill Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    8,259
    Likes Received:
    12,190
    Location:
    Wiltshire
    Just type @ symbol followed by the name(no spaces) there name will pop up and just click on it ;)
     
    Rodeo Joe likes this.
  3. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    @jamesmartin a while ago I saw a post about a resistor to get a temp sensor read correctly on the gauge, can't remember where I saw it but might have been by yourself.....got any more info on it as I could do with it as my 2.5n/a read high on the series 3 gauge its got.
    Thanks
    RJ
     
    Bobsticle likes this.
  4. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Thanks
     
  5. Bobsticle

    Bobsticle De Villes Advocaat

    Joined:
    Aug 8, 2013
    Posts:
    16,605
    Likes Received:
    18,050
    Location:
    Manchester
    It would have to be an adjustable one (potentiometer) or a hand full of varying strengths to try until you found one near enough.
     
  6. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Was with you all the way to simply.....
     
  7. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Have read loads of stuff about this but I don't see why I have one that works fine and the other heads straight for the red...no its not overheating before you ask got an infrared jobbie to check that.
     
  8. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    So basically if I get the volume switch from an old radio and shove it between the sensor and the gauge I can tone it down to get it within the gauge parameters?
     
  9. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Good enough for me do you buy it by the yard?
     
    Last edited: Apr 28, 2020
  10. jamesmartin

    jamesmartin Well-Known Member

    Joined:
    Dec 8, 2010
    Posts:
    87,511
    Likes Received:
    16,087
    Location:
    louth lincs
    cant remember the exact ones but they were cheap little adjustable resistors
     
    Rodeo Joe likes this.
  11. Bobsticle

    Bobsticle De Villes Advocaat

    Joined:
    Aug 8, 2013
    Posts:
    16,605
    Likes Received:
    18,050
    Location:
    Manchester
    You have to have one within the range you are adjusting. If your sender unit sends 4 to 20 killa bananas it’s no good fitting one that has a range of 0 to ten thousand killa bananas. You won’t get a fine enough adjustment. Same the opposite way about.
    I have no idea how many bananas, killa or otherwise s Land Rover temp sender has under its duvet so you’ll have to have a look.
     
    Rodeo Joe and wireman like this.
  12. Bobsticle

    Bobsticle De Villes Advocaat

    Joined:
    Aug 8, 2013
    Posts:
    16,605
    Likes Received:
    18,050
    Location:
    Manchester
    Your almost a qualified electrician then. :D
     
    Rodeo Joe likes this.
  13. Bobsticle

    Bobsticle De Villes Advocaat

    Joined:
    Aug 8, 2013
    Posts:
    16,605
    Likes Received:
    18,050
    Location:
    Manchester
    I’m sure someone with a certificate will be along soon and start talking ohms and watts and stuff but don’t listen to them.
    They don’t understand them either.
     
    Rodeo Joe likes this.
  14. Bobsticle

    Bobsticle De Villes Advocaat

    Joined:
    Aug 8, 2013
    Posts:
    16,605
    Likes Received:
    18,050
    Location:
    Manchester
    Oh and on some fuel gauges you need two pots. One to adjust the full and one to adjust the empty otherwise neither is accurate.
     
  15. Blackburn

    Blackburn Well-Known Member

    Joined:
    Feb 21, 2013
    Posts:
    2,646
    Likes Received:
    442
    Location:
    Tyneside
    Try swapping your senders from one vehicle to the other, The gauge has adjustment on the rear but difficult to get spot on.
    After market senders vary quite a lot.
    Are the vehicles series 2A /3 if so do both fuel gauges read accurately? Share the same regulated 10V supply as temp gauge!
    Is the gauge casing earthed as old style voltage regualtor needs th casing earthed.
     
  16. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    Yes all the wiring is good, just rewired the whole thing fuel gauges are ok and read as they should.
    What adjustment is there on the gauge? I haven't seen anything.
    I did notice when I put the new sender in that the gauge doesn't sit at the bottom any more and rests in the first white section. Its a new sender as the old one didn't work and I can only see one listed.
     
  17. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
  18. Blackburn

    Blackburn Well-Known Member

    Joined:
    Feb 21, 2013
    Posts:
    2,646
    Likes Received:
    442
    Location:
    Tyneside
    Rear of gauge has two small slotted holes one moves the start point the other the upper position.
    Hole maybe blocked by a bit cork.
    Mark there position before you move any.
    Small screwdriver pressed against the open end of slot or make a tool like attached.
     

    Attached Files:

    Rodeo Joe likes this.
  19. Rodeo Joe

    Rodeo Joe Well-Known Member

    Joined:
    Dec 30, 2017
    Posts:
    1,533
    Likes Received:
    690
    Location:
    norfolk
    That's great, I don't need to alter the high point do I so is it possible just to wind the start point back so when its running it will sit half way?
    Oh and the other thing is can I break it? Have been known to be a bit heavy handed:oops:.
     
  20. Blackburn

    Blackburn Well-Known Member

    Joined:
    Feb 21, 2013
    Posts:
    2,646
    Likes Received:
    442
    Location:
    Tyneside
    It does not move much so unlikely to break it.
     
    Rodeo Joe likes this.
< Previous Thread | Next Thread >