Radiator cooling fan
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HT4100 4.1, 4.5, 4.9 Discussion, Radiator cooling fan in Cadillac Engine Technical Discussion; hey, I am new in here, i own a 88 cadillac deville, the problem is that the cooling fan keeps ...
  1. #1
    rmetto is offline Cadillac Owners Member
    Join Date
    Apr 2004
    Posts
    1

    Radiator cooling fan

    hey,
    I am new in here, i own a 88 cadillac deville, the problem is that the cooling fan keeps on running after i have shut off the engine, the result is that it drains the battery,
    Do you think its the Power module that could be stuck on the "on" position ? any help would be greatly appreciated,

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  3. #2
    carnut is offline Cadillac Owners Master
    Automobile(s): 1988 Allante' (sold), 1984 Eldorado, 84 Sedan DeVille
    Join Date
    Feb 2003
    Location
    california
    Age
    67
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    5,805

    Re: Radiator cooling fan

    If you are referring to the fan for the cars interior, not the radiator fan, then it is the power module. Locate it under the hood above the climate control fan motor. A heavy gauge wire comes from the fan motor to the module, unhook the plug to the module to verify. This module was used for many years of Cadillac, slightly different in shape for various body styles. this is a Cadillac only part, Try a wrecking yard with a guaranty.

  4. #3
    Caddy-chris is offline Cadillac Owners Member
    Join Date
    Feb 2004
    Location
    Warren Ontario Canada
    Age
    35
    Posts
    52

    Re: Radiator cooling fan

    I think that you will find on the '88 deville, three relays mounted to the front of the drivers side shock tower, these control the cooling fans, give them a light tap when the fans are running with car off (when the cooling fans are not supposed to be running normally), if they shut off, you have found the problem. I think that you will find the problem to be a defective relay. (as I have on two past devilles)

    Chris

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