Car Thermostat has 3 diff coloured sensors (green,blue & brown) What do they all do?

Discussion in 'General Motoring' started by Danny G, May 9, 2017.

  1. Danny G

    Danny G

    May 9, 2017
    Likes Received:
    For the Peugeot 406 SALOON 2000, petrol.

    The thermostat housing has 3 different coloured sensors coming in to it, green, blue, and brown.

    What are each of these, and their job ??

    One is the engine temperature sensor,
    which shows you the on the dashboard, the temperature of the engine

    Here are pictures.



    What does the green one do?

    What does the blue one do?

    What does the brown one do?

    Thank you.
    Danny G, May 9, 2017
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