1987 - 1989 Fan Control Module
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HT4100 4.1, 4.5, 4.9 Discussion, 1987 - 1989 Fan Control Module in Cadillac Engine Technical Discussion; Hello all, I need a fan control module for a 1989 Seville. So far I have only found a used ...
  1. #1
    rjg
    rjg is offline Cadillac Owners Member
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    1987 - 1989 Fan Control Module

    Hello all,

    I need a fan control module for a 1989 Seville. So far I have only found a used one locally for $85.00. I've tried some of the internet junk yards and nothing has turned up. Does anyone know where I may be able to find one? Thanks for the help!

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    ehall's Avatar
    ehall is online now Cadillac Owners Connoisseur
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    Re: 1987 - 1989 Fan Control Module

    I don't know but I know they are out there. The one on my '85 went out last year and a local shop bought a replacement from somewhere. It was expensive as $@*! ... about $200 if I remember right.

  4. #3
    Dave S Texas's Avatar
    Dave S Texas is offline Cadillac Owners Enthusiast
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    Re: 1987 - 1989 Fan Control Module

    I recently had this same problem. There are modules for sale, and the price you stated is about right, but add shipping to that. What leads you to believe the module is faulty?

  5. #4
    rjg
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    Re: 1987 - 1989 Fan Control Module

    Quote Originally Posted by Dave S Texas View Post
    I recently had this same problem. There are modules for sale, and the price you stated is about right, but add shipping to that. What leads you to believe the module is faulty?

    With the air running, both fans run and the message cooling fan fault comes on. Also the one fan stayed running when the car was shut off.

    Thanks for the replies!

  6. #5
    kdcing is offline Cadillac Owners Fanatic
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    Re: 1987 - 1989 Fan Control Module

    AutoZone has them between $18 and $75, however, double check the diagnosis....I believe both cooling fans are to be on w/ the AC. 1 fan running w/ engine off may not be normal, however.

    Finally, when calling around for this part, be clear that the needed control unit is for the cooling fans....I believe the year of your car also has a control unit for the HVAC fan.

  7. #6
    ehall's Avatar
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    Re: 1987 - 1989 Fan Control Module

    The FSM for my 85 describes a test in the on-board diag that lets you manually power up and down the fans. That is how I confirmed the control module had failed.

  8. #7
    Dave S Texas's Avatar
    Dave S Texas is offline Cadillac Owners Enthusiast
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    Re: 1987 - 1989 Fan Control Module

    With the air running, both fans run and the message cooling fan fault comes on. Also the one fan stayed running when the car was shut off.

    ok, if one fan stays On when using the OBD system, that is a faulty module. I was going to suggest you check the module ground, since that is the common problem with intermmitent F41 codes.....hope you can find a good replacement unit.

  9. #8
    wilsonwilson is offline Cadillac Owners Member
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    Talking Re: 1987 - 1989 Fan Control Module

    Quote Originally Posted by rjg View Post
    Hello all,

    I need a fan control module for a 1989 Seville. So far I have only found a used one locally for $85.00. I've tried some of the internet junk yards and nothing has turned up. Does anyone know where I may be able to find one? Thanks for the help!
    If you have a Pull-a-Part close...I got one 2 years ago for $5.00 bucks, Bose Radio for $10.00 etc...

    Man it's almost a pleasure to get my own parts from this place....ALWAYS clean, all vehicles off the ground so to work under...NO I don't own stock in the place

  10. #9
    ehall's Avatar
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    Re: 1987 - 1989 Fan Control Module

    BTW, rockauto sells the AC Delco, it's listed under cooling systems, I think they call it radiator fan module

  11. #10
    rjg
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    Re: 1987 - 1989 Fan Control Module

    After following the shop manual's steps it was determined to be the fan control module. I found a used one online. The error message went away also. Thanks for the replies!

  12. #11
    wilsonwilson is offline Cadillac Owners Member
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    Re: 1987 - 1989 Fan Control Module

    It's called:
    Cadillac/GM COOLING FAN CONTROL MODULE - 1634863 [Delco OEM Part#] / 1641400
    [Interchange Part Number]
    For 1986-1991 Cadillac Seville

    $T2eC16VHJHoFGk-C8OD9BSK1fwSMwQ~~60_57_990x742.jpg

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