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40 series water temp guage ohm range?

Discussion in '40- & 55-Series Tech' started by Pskhaat, Aug 28, 2003.

  1. Pskhaat

    Pskhaat

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    This is per a 1978 FJ40 but I believe the water temperature guage ratings (at least the sensor itself) didn't change through the years. Does anyone know the temperate-resistance curve (or even min/max) for the water temp. sensor and/or guage?

    Thanks,
     
  2. 78 One owner

    78 One owner

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    From hammerheads manual:
    Sending Unit
    60c(140f) = 90ohms approx.
    80c(176f) = 50ohms app.
    100c(212f) = 27ohms app.
    105c(221f) = 23ohms app.