Alternator wiring/battery not charging

  1. Newbie Joined: Dec 2017 Posts: 17
    #1
    After a long time being sat, a trying a few alternators and various people attempting to get the the bottom of the battery not charging, this 2002 VTS has the alternator wiring in a bit of a state.

    As a starting point to trying to get this back on the road, does anyone know which way round these wires attach to the alternator?

    Thanks
  2. Newbie Joined: Dec 2017 Posts: 17
    #2




  3. Newbie Joined: Dec 2017 Posts: 17
    #3
    The terminals on the alternator are L (D+) and DFM
  4. Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge
    #4
    Looks like someone has cut the wiring and fitted a second plug????

    Those 2 wires on the loom need to connect to the 2 small wires on the alternator.

    I can't remember, but the loom red wire goes to the brown on your plug and the green/blue goes to the yellow one. I think that's the correct order. I'm not 100%.

    If you can find another picture of a post 2000 saxo/106 you will see the colours. I don't have my spare wiring loom here, otherwise I'd give you a 100% answer.
  5. Newbie Joined: Dec 2017 Posts: 17
    #5
    Yes it looks that way. I believe this is the 3rd alternator to be swapped in.

    So I've tested continuity of the alternator warning light (1072, liliac wire) to the D+ on alternator from chassis plug, also continuity of DFM terminal to the ECU and charging post on alternator to positive battery terminal.

    Now with the car on, the warning light is off and no difference between charging post of alternator and battery positive.
  6. Newbie Joined: Dec 2017 Posts: 17
    #6
    Battery light off and battery not charging. Anyone got any ideas?
  7. Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge
    #7
    Quote:
    Originally Posted by bifrogifro View Post
    Battery light off and battery not charging. Anyone got any ideas?
    There won't be a potential between the positive post of the alternator and the positive post of the battery... they're connected!

    What's the voltage across the battery when its running?
  8. Newbie Joined: Dec 2017 Posts: 17
    #8
    Voltage across battery is ~12V. I meant no difference between alternator charging post to ground and battery positive to ground, sorry if that was unclear.

    No notable voltage drop on either side and good continuity to ground...
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  9. Established Member Joined: Aug 2012 Posts: 2009 Saxò VTS 16v
    #9
  10. Saxperience Forum Bum Joined: Dec 2012 Perth Posts: 3665 Peugeot 106 1.1 Turbo Peugeot 106 1.5D Turbo Peuge
    #10
    Must be a break in a wire somewhere, or a blown fuse.

    unless the alternator is actually dead?