Battery light stays on

Discussion in 'General Motoring' started by karl, Nov 5, 2005.

  1. karl

    karl Guest

    I would like to get help with this problem: after working on the
    starter the

    Battery warning light stays on all the time.
    After starting the voltage moves to 14.2 V (at battery).

    The Service Manual, p 25-28, suggests that the alternator is defective
    and says that it should be checked. But I consider the probability very
    low that the alternator fails at the same time work is done on the
    starter - I believe it is more likely that I inadvertently caused some
    damage (maybe just a disconnection) to the wiring.

    1984 Accord, 4 Door
    karl, Nov 5, 2005
  2. karl

    Charlie S Guest

    The voltage at a fully charged battery is about 12.6 volts.

    With the engine running, and the alternator working, the voltage will
    be about 14.2 volts. If you have 14.2 volts, the alternator and
    voltage regulator are working properly.

    Check the wiring.
    Charlie S, Nov 5, 2005
  3. karl

    karl Guest

    Thank you; I agree with your diagnosis.

    The question now is, which one of the wires (or connectors)
    in the general area of the starter, if damaged, causes the battery
    light to stay on.
    karl, Nov 5, 2005
  4. karl

    Burt S. Guest

    If you try this the light should go out:

    1) Disconnect the connector at the back of the alternator.

    2) Disconnect the choke heater connector or the EFE heater control
    unit if it has one.

    A broken connection between the charger and battery might light up
    the light but that doesn't seem to be the problem.
    Burt S., Nov 6, 2005
  5. karl

    karl Guest

    Thank you, but this test assumes the wiring to be correct; read on.

    This problem was the result of really lousy work. When I reconnected
    the disconnected wires I had forgotten how they had been connected and
    I connected them by their length and ease of reconnecting them. My
    first choice of wires to the air temp switch would have been correct
    but they were a little short. I ended up connecting the wires of the
    choke heater to the air temp switch, cutting both out of the circuitry,
    and grounding "L" of the voltage regulator. I didn't notice that the
    color codings didn't match, but I thought it is odd and I was
    suspicious that two pairs of wires originating at the same place (near
    the starter) of a harness are connected - this didn't make sense! And
    again later when I looked for the cause of the ON battery light I was
    suspicious about these two pairs of wires but did not act. I had a very
    strange block.
    karl, Nov 21, 2005
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