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Is your TD5 fuel gauge not working?

Discussion in 'Land Rover Discovery' started by stamford, Nov 20, 2010.

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  1. stamford

    stamford New Member

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    One day the needle of the fuel gauge dropped off the scale, light on! A few searches of this great forum gave me some info on where to locate the unit in question. However a couple of bum steers didn't help.

    Anyway, for those of you who have had this problem here's a tip.

    After dismantling most of the rear of the car to gain access to the floor I found the access plate not as described in some searches. It is right in the middle of the boot floor. I found it best to cut a neat flap that could allow easy access to this area for future use.

    Once removed the pump and sender can be inspected. Using a multimeter set to ohms check across the two sender pin terminals, both small wired, the other two thicker gauge wires are for the pump. If no reading is seen here check further down onto the sender scale pcb itself. Check across the two soldered joints, lift the float arm up, the reading should decrease in value. If you get no reading or if sporadic then check the soldered joints.

    I found I had a poor soldered joint on one of the two wires on the pcb, re-soldered and checked again it was resolved.

    Refit pump unit, I would refit the tank seal first once cleaned, then refit the pump unit. Remember to tilt the unit to the right and drop the float arm in first then straighten the unit up, saves you dicking around with the seal afterwards. Locate the tab to align then hand tighten up the locking collar whilst pushing down on the sprung loaded pump unit.
     
  2. battenberg

    battenberg Well-Known Member

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    What were your exact symptoms for this fault?

    I have a fuel guage that dont read correctly, i have also changed the pump unit and it's been the same for both pumps..
     
  3. Mutsnuts

    Mutsnuts New Member

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    Just like to say a massive thank you for your advice.. As my fuel gauge went down this morning..if it wasn't for your it's I would of have to go to the garage .. As is its the wire had broken off the fuel gauge inside the tank.. A bit of a tinkle later all good again.. Thank you very much once more...
     
  4. thebiglad

    thebiglad Well-Known Member

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    Not quite sure what your urinary habits have got to do with this topic, but well done anyway:D


    Sorry, can't help taking the pîss :D:D:D:D:D:D:D:D:D:D.
     
  5. jeremytd5

    jeremytd5 New Member

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    Just had this issue after spending all day trying to fix leaking sunroofs... Hoping its as easy as this and not the £100+ for a new pump etc..
    Thanks in advance
     
  6. perky64

    perky64 New Member

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    Hi I have a td5 1999 fuel gauge stuck at a 1/4 tank low level light on replaced pump due to failing but gauge still not working any ideas of wiring faults thanks perky 64
     
  7. listerdiesel

    listerdiesel Well-Known Member Events Planner

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    If you have 3rd row seats fitted, just one straight cut across the top of the two slots in the carpet after the seat fixing finishers are removed will give you a flap for access, refit the finishers, they will hold the carpet in place.

    Peter
     
  8. discodrivercumbria

    discodrivercumbria Well-Known Member

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    he's already replaced pump so he know's how to get to it! a sender problem i think!
     
  9. perky64

    perky64 New Member

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    Hi tried 2new pumps gauge still the same have a feed at unit for gauge tried a separate earth still no joy does the wiring rub through anywhere ?
     
  10. listerdiesel

    listerdiesel Well-Known Member Events Planner

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    Er, yes, but I was showing how to make the access easier for others as well, while minimising damage to the carpet.

    Peter
     
  11. Stephen l

    Stephen l New Member

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    I had a problem with the fuel gauge changing its mind on how much fuel I had
    I've finally got round to looking at it today and found the sender unit hanging around by the wires so I reconnected it to the pump and all fine
     
  12. Td5 beast

    Td5 beast New Member

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    Hello I have a 2003 discovery td5 engine conked out but fuel gauge reads 1/4 full so I fitted a new sender unit but again when fuel gauge hits the 1/4 full line it conked out again but when I put a Jerry can of diesel in and wait for it to prime up starts fine so i go fill up with 30 pounds worth of diesel and drives brilliant no problems at all until i get to the 1/4 line again then conks out any other suggestions much appreciated thankyou
     
  13. thebiglad

    thebiglad Well-Known Member

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    The fuel sender is part of the in-tank fuel pump and if this incorrectly installed it will give inaccurate readings.
     
  14. Td5 beast

    Td5 beast New Member

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    As far as know I installed the sender unit the exact same way as the previous one that was on the pump thanku
     
  15. Landmark2

    Landmark2 Well-Known Member

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    Hi, Are you sure you bought the correct pump? Defender TD5's are shorter.
    Griff
     
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