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Thread: fan control 2008 grand caravan

  1. #1
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    fan control 2008 grand caravan

    Have a 2008 grand caravan and the heater fan doesn't work on high. Works fine in other postions.

  2. #2
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    Only guessing but .... same issue as TJ Heater Controls ??? Resistor ???
    Newmarket Swamper


    OF4WD Member # 5246

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    My diagrams at home only go to 2007, but it shows that all ground paths go through the resistor like IV said. According to it (and I don't think they changed in '08), power is supplied through the black wire, and ground on the dark green. Since you have control on the other speeds we can be pretty sure you've got 12V+ on the black.

    I would suggest unplugging the fan, and putting a test light on the dark green wire. Then cycle through from low, mid-low, mid-high and high. You're checking ground, so be sure the test light it connected to positive.

    It's odd though as my diagram shows all the current flow would travel through the "high" portion of the resistor. I can check on Mitchell on Monday if you'd like confirmation.
    ....-Noltz
    '91 Frankenheep Edition. 4.0, 4" BDS, Richmond 8.8, 35" KM2's, Titan 12k, ... gone.
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    Ok Noltz check. This is what I got Blue/grey wire from low to high - - - +,blue /orange - - - + black/green - - - -, blue/purple- - - +,blue/light grey nothing on first 3 settings and on high showed -.

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    Ok you disconnected at the resistor then. What about at the blower, with the resistor still plugged in?

    Again, my wiring diagrams stop at '07 ... but this is the one Im working from;



    I zoomed in and blew up the wiring colours there for clarity.

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    That was with everything still plugged in. Stuck probe in the backside of the plug at the switch for the readings. I'll check at the motor. Thanks

  7. #7
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    Looks like the resistor is bad. Thanks for all the help Noltz! Diagrams were a big help.

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