Question about Ford Windstar

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My 2000 ford windstar will not charge,my power windows stop working.my wipers don't work ,power locks don't work,gas gauge and speedometer dont work and my signal lights dont work.i changed the alternator and nothing still works.can you help me please

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  • Ford Master
  • 4,369 Answers

Your alternator may be controlled by the PCM, engine computer.

Posted on May 21, 2011

  • gerry bissi May 21, 2011

    The problem will not be the PCM but the wiring going beween the lalternator and the PCM. Check the condition of the connector at the alternator for corrosion and pin damage and for a broken wire near the connector. I assume the Alternator light is on. I assume you cleaned battery terminal connections too.



    From the shop manual:



    Charging System



    This vehicle is equipped with a powertrain control module (PCM) controlled "smart charge" charging system. The PCM-Controlled Charging System is a system whereby the PCM determines the optimal voltage setpoint for the charging system and communicates this information to the voltage regulator. The PCM-Controlled Charging System is unique in that it has two uni-directional communication lines between the PCM and the generator/regulator. Both of these communication lines are pulse-width modulated. The GEN COM line communicates the desired setpoint from the PCM to the voltage regulator and the GEN MON line communicates the alternator load condition to the PCM. The third pin on the voltage regulator, the A circuit pin, is a dedicated battery voltage sense line.


    --------------------------------------------------------------------------------------------------

































    Normal Charging Systems Voltages
    Terminal A Alt B+ Batt Eng to Bat Gnd
    Key OFF 12V 12V 12V 0V
    Key on - engine off 12V 12V 12V 0V
    Engine running 13- 15V 13- 15V 13- 15V 0V

    ---------------

    Possible causes



  • A Circuit 35 (OR/LB).
  • A Circuit fuse link.
  • B+ Circuit 36 (YE/WH).
  • B+ Circuit fuse links.
  • Generator.
  • PCM
  • GEN-COM Circuit 586 (RD/PK).
  • GEN-MON Circuit 585 (VT).

  • ------------

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