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Thread: a/c fan not working

  1. #1
    Join Date
    Feb 2004
    Location
    Texas
    Posts
    15

    Default a/c fan not working

    any ideas where to start looking.....other than the fuse box? A/C functions, fan under the dash does not...thanks, Brian

  2. #2
    Join Date
    Dec 2003
    Location
    Canada, ON
    Posts
    732

    Default

    Pull the plug that is on the side of the radiator out (if it is like the 535i) and short the brown wire with one of the other wire, check if the fan works, then try to short the brown wire with the other wire, check the fan function again.

    One is the slow speed the other the high speed...
    '85 Euro 635csi Race Turbo, megasquirt, Group A
    '92 525i Touring 5 speed, 3.46 diff, UUC 8.5lb flywheel, soon to be turbo.
    '02 Subaru WRX Wagon with STI springs, bigger sway bars

  3. #3
    Join Date
    Jan 2004
    Location
    Apex, NC
    Posts
    471

    Default

    You mean the blower fan in the cabin or the auxilliary radiator fan?
    Scott
    '93 525iT 245k miles (sold, but not forgotten)
    '11 TSX Sport Wagon
    '00 328i
    '78 MGB
    '08 Saab Aero


  4. #4
    Join Date
    Feb 2004
    Location
    Minnesota
    Posts
    499

    Default

    Usually if the blower fan in the cabin only works on high (#4 in my car, '90535) then it probably is the fan resistor. The early ones have the "sword", later E34's have resistor pack. Bruno's site has good repair descriptions.

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