Battery Isolator Caused Catastrophic Instrument Cluster Failure.

Discussion in 'Tech/Mech General' started by Gorsecover59, Jun 12, 2015.

  1. Gorsecover59

    Gorsecover59 Funster

    Joined:
    Jun 6, 2011
    Messages:
    42
    Likes Received:
    17
    Location:
    Jersey
    Hi All,
    Just a word of caution.
    I fitted a £5 ebay battery isolator to the neg terminal of the cranking battery to ensure no voltage drain when vehicle not in use.
    As time went on suffered problems with elec windows seeming to stall, Put this down to stiff winding mechanism.
    Recently noticed issues with fuel gauge being erratic.
    Final straw ,parked vehicle and fuel and temp gauge going ballistic.Switched ignition back on............nothing,zilch,nowt.
    Removed battery isolator and reconnected normal connection to Neg terminal.
    Fuel gauge went to full,the wrong way round and when vehicle started rev counter went to 6000 rpm on tickover (revcounter,not engine).
    Sent inst cluster off for repair only to find it`s terminal.
    New fiat replacement..................sit down for this one please...........£850.
    Ebay replacement £38...............only prob is my mileage has gone from 15000 miles to 179,000 overnight as you inherit the previous vehicles mileage.
    Be warned and ditch those damned isolators that appear to have a good connection but can deteriorate over time causing intense make/break votages that fork yer instruments.
    Martin
     
  2. jonandshell

    jonandshell Funster

    Joined:
    Dec 12, 2010
    Messages:
    5,252
    Likes Received:
    7,858
    Location:
    West Norfolk
    Quite a few modern vehicles have set procedures for battery connection/disconnection.
    Your experience is a good example of why.

    Sporadic disconnections can upset software in ECUs.
     
    • Like Like x 1
  3. chaser

    chaser Funster

    Joined:
    Feb 16, 2013
    Messages:
    7,137
    Likes Received:
    7,713
    Location:
    uttoxeter
    That's what I thought but no expert, not the isolater at fault but the switching on and off , how does the radio and clocks and stuff work without constant power.
     
  4. Gromett

    Gromett Funster

    Joined:
    Feb 27, 2011
    Messages:
    7,913
    Likes Received:
    13,955
    Location:
    UK
    Ouch, Thanks for the warning.
     
  5. Lenny HB

    Lenny HB Funster

    Joined:
    Oct 18, 2007
    Messages:
    5,222
    Likes Received:
    5,022
    Location:
    West Sussex
    Sorry to hear about your problems, any chance a fiat dealer can reset your mileage, probably won't be interested but worth asking.
    Fiat recommend when changing a battery to connect another battery to the jump terminals so that the electronics all remain powered up to avoid problems, so to me that gives a clue that fitting an isolator is not a good idea.
     
    • Like Like x 1
  6. steviebouy

    steviebouy Funster

    Joined:
    Jun 18, 2011
    Messages:
    59
    Likes Received:
    55
    Location:
    Pucklechurch, Bristol
    These people may be able to help with resetting your mileage - http://digidash.co.uk
    Sorry that's not a link - just discovered something else everybody else seems to be able to manage that I can't. Apart from construct a sentence, that is.
    Steve
     
  7. EthnGeoff

    EthnGeoff Funster

    Joined:
    Jan 13, 2010
    Messages:
    297
    Likes Received:
    228
    Location:
    County Durham
    Tis a link.....and it works.:clap2:
     
    • Like Like x 1
  8. gus-lopez

    gus-lopez Funster

    Joined:
    Aug 18, 2014
    Messages:
    4,353
    Likes Received:
    7,918
    Location:
    Lorca,Murcia,Spain
    many of the new vehicles shutdown /start up/disconnect/connect/jump start procedures are like secret handshakes for the masons. One for Citroen I posted the other day is.
     
    • Like Like x 1
  9. steviebouy

    steviebouy Funster

    Joined:
    Jun 18, 2011
    Messages:
    59
    Likes Received:
    55
    Location:
    Pucklechurch, Bristol
    Well I never - it must do it automatically!
    Steve
     
  10. Gorsecover59

    Gorsecover59 Funster

    Joined:
    Jun 6, 2011
    Messages:
    42
    Likes Received:
    17
    Location:
    Jersey
    Thanks for your replies..................very helpful
    Martin
     
  11. maison

    maison Funster

    Joined:
    Oct 7, 2013
    Messages:
    1,432
    Likes Received:
    3,646
    Location:
    South Wales & Burgundy
    My Fiat Ducato 2014 has built in battery isolating switch. I have used this to "reboot" the radio when it developed a fault.

    If fitted by Fiat surely it is OK to use the switch to isolate the battery when vehicle is not in use?

    The comments from Fiat that you quoted suggest it may cause problems. Doh!:cool:
     
Loading...

Share This Page