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Flashing hazard lights

Discussion in 'Land Rover Discovery' started by unequalwolf8, Mar 17, 2017.

  1. unequalwolf8

    unequalwolf8 Active Member

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    Hi all,
    My disco td5 is giving one problem after another. Had to replace the water pump because that failed, after i completed that and hooked up the battery i got hazard light flashing and only turning off when battery cable is disconnected. The car does start fine, only not sure how to get the haz. lights to stop. I have already tried the inertia switch as I have read about that on the web but it does not solve the problem
     
  2. neilly

    neilly Well-Known Member

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    Morning,

    Have you checked the hazard switch is not pressed in??

    Cheers
     
  3. unequalwolf8

    unequalwolf8 Active Member

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    Hi,
    Nope not pressed in, cause I already tried that a few times
     
  4. unequalwolf8

    unequalwolf8 Active Member

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    It starts the moment I turn the key in the switch on position
     
  5. sierrafery

    sierrafery Well-Known Member

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    disconnect then reconnect the battery if they dont stop we'll speak then
     
  6. unequalwolf8

    unequalwolf8 Active Member

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    Did that many times already. I am having this problem since a week, maybe longer. Is it possible to disable the haz lights but still retain normal turn signal indicator.
     
  7. sierrafery

    sierrafery Well-Known Member

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    Unplug the hazard switch, if still no joy i'm affraid the problem is with the BCU or IDM(part of the interior fusebox), the final command for hazards and direction indicators is on the same input on serial data bus from the BCU to IDM so you can't disable the hazards and retain indicators unless you want to make some complex wiring mod... do you have RAVE?
     
  8. unequalwolf8

    unequalwolf8 Active Member

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    Thanks will try and see what happens, yes have rave. I did already remove the fusebox but was not ablr to get it out completed. Is the IDM located behind the fusebox?
    My powerlocks have also packed up a few weeks ago and now stuck with flasher issues. Are these things related?
     
  9. sierrafery

    sierrafery Well-Known Member

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    yes, the central locking is also managed by the BCU and IDM, The IDM is actually part the fusebox which is generally called IDM (= Intelligent driver module ) but if the central locking is making tricks too then IMO the BCU is more suspect, unfortunately this one is not plug and play like the fusebox and need complex programming with dedicated tester to set it for your vehicle's equipment... though if you can get hold of a known good fusebox better swap that to rule it out cos they used to suffer from water ingress or moisture(so does the BCU), only thing you must do for the fusebox is to disconnect the battery before you swap it then after reconnection turn ignition on II and let it so 5 minutes for the IDM to gain digital data communication with the BCU, here's a pic with the IDM

    IDM.jpg
     
  10. unequalwolf8

    unequalwolf8 Active Member

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    Thanks, will try suggestions, otherwise back to the dealer
     
  11. unequalwolf8

    unequalwolf8 Active Member

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    Turned out water damage in the fusebox, see pix IMG_20170319_201653.jpg
     
  12. sierrafery

    sierrafery Well-Known Member

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    You was lucky it wasnt the BCU:cool:
     
  13. unequalwolf8

    unequalwolf8 Active Member

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    Connected cleaned fusebox but after going switch on haz lights still come on. I can hear the locks doing something just before haz comes on. Is this a known issue?
     
  14. sierrafery

    sierrafery Well-Known Member

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    It seems that the water ruined the IDM and only cleaning the board is not enough,... IMO you'll need other known good one
     
  15. unequalwolf8

    unequalwolf8 Active Member

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    Might it be possible that the issue is in the inertia switch? I have a defender td5 of which i could borrow the switch. Hopefully taking the switch out will not give an problem on defender. Other fusebox is very difficult to get where I am.
     
  16. sierrafery

    sierrafery Well-Known Member

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    The inertia switch cuts the fuel if it's tripped so it wouldnt start