Close

Results 1 to 9 of 9
  1. #1
    DF VIP Member Undertaker's Avatar
    Join Date
    Nov 2000
    Location
    Earth
    Posts
    2,527
    Thanks
    38
    Thanked:        184
    Karma Level
    420

    Default focus 2004 battery light

    I'm sure someone on here will know what's wrong


    ford focus 2004 diesal 1.8 tdci

    battery light comes on after 30 seconds. been driving it for weeks with this fault. obviously front windscreen demister is disabled because of this.

    a few days back I started car in morning. switched on back demister electric. dropped little one to school. got back in car and car failed to start. not enough juice.

    jumpy started it and drove but electrical power kept cutting off. needles going haywire etc.

    got it at home now. plugged into mains and left it to chsrge the battery via an extension lead out of the window. seems to be starting fine now.

    not sure what the fault is. some say battery others say alternator. with some saying smart charge harness.

    any ideas or what I should be testing. don't want to fork out 100 quid for a battery if that isn't at fault.

    any ideas guys?

  2. #2
    DF PlaYa New Art Riot's Avatar
    Join Date
    Jul 2002
    Location
    Birmingham
    Posts
    936
    Thanks
    93
    Thanked:        29
    Karma Level
    236

    Default Re: focus 2004 battery light

    might be worth topping up battery with some de ionised water dropping in a couple of granville bat aid tablets in each cell and giving it a recondition charge with a smart charger such as ctek mxs 5.0
    I think it should be 14.4 volts whilst the engine is running

    Thanks to New Art Riot

    Over Carl (28th November 2016) 


  3. #3
    DF Super Moderator Over Carl's Avatar
    Join Date
    Apr 2006
    Location
    London
    Posts
    13,076
    Thanks
    3,815
    Thanked:        1,653
    Karma Level
    1269

    Default Re: focus 2004 battery light

    Once it's charged, put a volt meter on it. It will probably be reading about 12.5v or higher.

    Also check when it's plugged to the car before it's started, voltage should drop much.

    Once the car is started, voltage should rise to about 13.5-14.5ish (not more than 15v).

    If voltage is rising when car started then probably battery problem.

    If voltage not rising when car started then probably alternator or maybe this smart charge thingy.

  4. #4
    DF Jedi plug1's Avatar
    Join Date
    Jan 2001
    Location
    glesga
    Posts
    1,931
    Thanks
    359
    Thanked:        233
    Karma Level
    332

    Default Re: focus 2004 battery light

    I would allso check the earth strap from a the engine to the body

    Thanks to plug1

    Over Carl (28th November 2016) 


  5. #5
    DF Super Moderator Teajunkie's Avatar
    Join Date
    Dec 2009
    Location
    Devon
    Posts
    3,577
    Thanks
    1,531
    Thanked:        1,505
    Karma Level
    477

    Default Re: focus 2004 battery light

    Battery warning light is the alternator. 100%
    It could be simple like the rectifier or regulator has gone.
    Last edited by Teajunkie; 28th November 2016 at 01:08 PM.
    Find me on Instagram and twitter @mrteajunke.

  6. #6
    Mummy's little soldier I Black Belt's Avatar
    Join Date
    Jan 2008
    Location
    my house
    Posts
    2,519
    Thanks
    342
    Thanked:        506
    Karma Level
    375

    Default Re: focus 2004 battery light

    Quote Originally Posted by Teajunkie View Post
    Battery warning light is the alternator. 100%
    It could be simple like the rectifier or regulator has gone.
    Yep.

    Take it to any decent battery centre and they'll check the draw and recharge for free
    AA or RAC will do the same for you.

  7. #7
    DF Wh0re russell's Avatar
    Join Date
    Oct 2001
    Location
    Essex
    Posts
    170
    Thanks
    63
    Thanked:        33
    Karma Level
    216

    Default Re: focus 2004 battery light

    if it has 3 thin wires from alternator ,give them a pull one at a time .often the blue one breaks
    Russell

    Thanks to russell

    Over Carl (4th December 2016) 


  8. #8
    DF VIP Member Undertaker's Avatar
    Join Date
    Nov 2000
    Location
    Earth
    Posts
    2,527
    Thanks
    38
    Thanked:        184
    Karma Level
    420

    Default Re: focus 2004 battery light

    thanks for all your tips guys, will find out in a few days time when I get a chance to take it to a garage,
    lets see what they say

    been starting fine after charging up the battery but dare not take it out for a spin until its sorted properly,

  9. #9
    DF VIP Member Undertaker's Avatar
    Join Date
    Nov 2000
    Location
    Earth
    Posts
    2,527
    Thanks
    38
    Thanked:        184
    Karma Level
    420

    Default Re: focus 2004 battery light

    red one had broke

    main fault was the alternator . put in a reconditioned one and all sorted

    198k on clock now. place your bets on how long the car will last

    Thanks to Undertaker

    Over Carl (4th December 2016) 


Similar Threads

  1. Replies: 6
    Last Post: 24th April 2015, 08:24 AM
  2. Replies: 20
    Last Post: 7th January 2012, 07:22 PM
  3. Replies: 1
    Last Post: 7th December 2008, 07:59 PM
  4. Recommend a battery to make Pandoras Battery
    By Clubber Lang in forum Sony Handhelds
    Replies: 11
    Last Post: 30th December 2007, 03:29 AM
  5. ford focus engine management light
    By xrwardy in forum Cars
    Replies: 6
    Last Post: 13th March 2005, 08:51 AM

Social Networking Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •