D battery charge light issues
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Thread: D battery charge light issues

  1. #1
    1000+ Posts forumnoreason's Avatar
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    Default D battery charge light issues

    I've been running the motor and battery charge light will not extinguish on dash main warning signals. Ducellier Alternator charging at around 13.4 so low and will have tested but wondering if the NOS ducellier regulator might need adjusting?

    Any ideas folks? Bill?!!

    cheers Steven

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  2. #2
    Fellow Frogger! marc61's Avatar
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    Worth checking that the spade connector on the regulator for the light is ok and that the regulator earth is ok.

    Cheers

    Marc
    Cheers, Marc.

    1987 CX GTi T2 Maikonics
    1972 SM 2.7 carb
    1972 DS21 EFI

  3. #3
    1000+ Posts forumnoreason's Avatar
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    All the wiring, regulator is new and I assume correctly grounded : (

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    Fellow Frogger! citroenthusiast's Avatar
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    It is unlikely a bad ground. A bad ground will make the regulator "float" above ground and overcharge the battery. A simple test to verify it's not the alternator is connect the EXC terminal of the alternator directly to the battery. You should see over 14.5 V at 2000 rpm.

    Take the cover off the regulator box. As you probably know, the light relay is separate from the vibrating contact voltage regulator inside the regulator box. You may need to bend the light relay spring holder a bit to make the light go out.
    forumnoreason likes this.
    Cheers,
    John T.

    54 11BL; 61DS19 LHM (son's); 71DS21 BVH; 73SM 3.0; 73SM 2.7EFI; 73SM 3.0 (other son's); 74 Maserati Merak

  5. #5
    1000+ Posts forumnoreason's Avatar
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    I've had the auto electrician look at the alternator and he says the circuit for the warning light is cactus which explains why the warning light is on always (I reversed polarity one day with a dumb battery manoeuvre)....
    Anyway he reckons I'm looking for a rectifier/regulator to install but I'm wondering if replacing the whole diode support would sort it out.
    This is the part I think could solve it?

    NOS diode support | Group 2: Engine outerparts, Ignition, Carbs, Manifolds, Clutch | CitroŽn Andrť Spareparts

    btw,
    He said he tested the alternator and it is working otherwise fine.
    Last edited by forumnoreason; 24th January 2017 at 09:39 PM.

  6. #6
    1000+ Posts robmac's Avatar
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    Quote Originally Posted by marc61 View Post
    Worth checking that the spade connector on the regulator for the light is ok and that the regulator earth is ok.

    Cheers

    Marc
    I'd check the a field diodes, usually within the alternator. One of them open circuit is a likely cause.

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