1995 E36 328i Heater blower how to test

Notices
 

Thread: 1995 E36 328i Heater blower how to test

Reply to Thread
Results 1 to 10 of 10
  1. 1995 E36 328i Heater blower how to test 
    #1
    Bimmer Fan
    Car Details
    badshot's Car Details
    Model of Car:
    528i SE
    Year of Manufacture:
    1997
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    badshot's Avatar
    Join Date
    Aug 2009
    Location
    Orpington
    Posts
    18
    Thanks
    1
    Thanked 8 Times in 6 Posts
    Hi All

    Ive recently aquired a 328i Touring on a 95 M plate and the heater fan doesnt work, Ive had a good look round the forums and a few things are suggested, but I want to disregard the fan first, so my question is how do i get 12 volts to it to see if its dead or not?

    Ive pulled out the aircon relay under the bonnet and put a link accross pins 85 and 87.

    Any help eliminating the fan, as i cant seem to get any voltage to the blower resister, although it does change state when the fan control is turned on and off?

    Much confused of Orpington
    If i fall through the matress I'll see you in the spring
     
     

  2. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  3.  
    #2
    BMW Guru
    Car Details
    billywhizz1984's Car Details
    Model of Car:
    E36 323i x 3, 325TDS x 1, 320i x 2
    Year of Manufacture:
    1999, 1998, 1997 x 2, 1996, 1995
    Transmission Type:
    Auto, Auto, Manual, Auto, Auto, Manual
    Car Body Type:
    Touring x 4, Convertible x 6
    billywhizz1984's Avatar
    Join Date
    Sep 2009
    Location
    North East
    Posts
    2,456
    Thanks
    165
    Thanked 925 Times in 701 Posts
    Do you have Standard heating (three dials), Air con (three dials plus air-con button) or full Climate Control (digital display)?
     
     

  4.  
    #3
    Bimmer Fan
    Car Details
    badshot's Car Details
    Model of Car:
    528i SE
    Year of Manufacture:
    1997
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    badshot's Avatar
    Join Date
    Aug 2009
    Location
    Orpington
    Posts
    18
    Thanks
    1
    Thanked 8 Times in 6 Posts
    Quote Originally Posted by billywhizz1984 View Post
    Do you have Standard heating (three dials), Air con (three dials plus air-con button) or full Climate Control (digital display)?
    Hi Billy

    I have aircon, not digital

    Paul
    If i fall through the matress I'll see you in the spring
     
     

  5.  
    #4
    Dr of BMW gildersol's Avatar
    Join Date
    May 2008
    Location
    scotland
    Posts
    1,423
    Thanks
    171
    Thanked 428 Times in 356 Posts
    The fuse for the blower is no.20 (30A). There is a blower motor relay in the fusebox which energises (clicks) when you switch on the ignition. This relay switches power to the blower switch which in turn switches power to the resistor.
    If the relay doesn't work, you can short across pins 30 and 87.
     
     

  6.  
    #5
    Bimmer Fan
    Car Details
    badshot's Car Details
    Model of Car:
    528i SE
    Year of Manufacture:
    1997
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    badshot's Avatar
    Join Date
    Aug 2009
    Location
    Orpington
    Posts
    18
    Thanks
    1
    Thanked 8 Times in 6 Posts
    Quote Originally Posted by gildersol View Post
    The fuse for the blower is no.20 (30A). There is a blower motor relay in the fusebox which energises (clicks) when you switch on the ignition. This relay switches power to the blower switch which in turn switches power to the resistor.
    If the relay doesn't work, you can short across pins 30 and 87.
    Ok Gildersol,

    I tried the above and I get my dipped beam come on?, Im on an orange relay number bosch 0 332 019 456, according to realoem the airconditioning relay i think???
    If i fall through the matress I'll see you in the spring
     
     

  7.  
    #6
    Bimmer Fan
    Car Details
    badshot's Car Details
    Model of Car:
    528i SE
    Year of Manufacture:
    1997
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    badshot's Avatar
    Join Date
    Aug 2009
    Location
    Orpington
    Posts
    18
    Thanks
    1
    Thanked 8 Times in 6 Posts
    Right i had the wrong relay lol, i now have the right one, but dont seem to be able to get 12v, only a short burst of 6 odd volts across 30 and 87 when the fan switch gets switched on then it dies and goes right down.

    Ive got 12v dc between 85 and 86 and very confused now any more help gladly appreciated, cheers Billy and Gildersol
    Last edited by badshot; 03-04-2010 at 19:40.
    If i fall through the matress I'll see you in the spring
     
     

  8.  
    #7
    Dr of BMW gildersol's Avatar
    Join Date
    May 2008
    Location
    scotland
    Posts
    1,423
    Thanks
    171
    Thanked 428 Times in 356 Posts
    You should get 12v between 85 and 86 with the ignition on, do you hear the relay click when you turn the ignition on? If fuse 20 is ok you should get 12v between earth and pin 30 on the relay at all times, then, when you turn on the ignition and the relay energises, you should get 12v between earth and pin 87 on the relay and also between earth and the green/brown wire at the back of the blower switch. If you don't get this, you need to check for 12v at the fuse itself.

    This is the position of the blower relay, although it can differ sometimes
    Attached Files
     
     

  9.  
    #8
    BMW Guru
    Car Details
    billywhizz1984's Car Details
    Model of Car:
    E36 323i x 3, 325TDS x 1, 320i x 2
    Year of Manufacture:
    1999, 1998, 1997 x 2, 1996, 1995
    Transmission Type:
    Auto, Auto, Manual, Auto, Auto, Manual
    Car Body Type:
    Touring x 4, Convertible x 6
    billywhizz1984's Avatar
    Join Date
    Sep 2009
    Location
    North East
    Posts
    2,456
    Thanks
    165
    Thanked 925 Times in 701 Posts
    There are four components in the system...Relay, Fan switch, Ballast resistor (hedgehog) and the Fan itself. Bridge each component as shown in this wiring digram (pages 415 & 416)....

    E36 Compact & Z3 UK Genuine BMW Wiring Diagrams

    ....and whichever component when bridged activates the fan is the failed item
     
     

  10.  
    #9
    Bimmer Fan
    Car Details
    badshot's Car Details
    Model of Car:
    528i SE
    Year of Manufacture:
    1997
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    badshot's Avatar
    Join Date
    Aug 2009
    Location
    Orpington
    Posts
    18
    Thanks
    1
    Thanked 8 Times in 6 Posts
    Cheers fellas,

    Ive managed to rule out everything but the heater blower itself, so i guess its knackered, ive managed to get a used one of another 328 from a nice chap on here for a good price, ive got to fit the bugger now, i havent actually put 12v on my heater cause i cant get to it (other than a wire across pins 30 and 87), but if everthing else is working im hopping it just needs another blower.

    Thanks again, being part of a forum like this is the difference between having a go myself or spending a small fortune with a mechanic, and not being able to run the cars you love.

    Cheers again guys, I hope I can return the favor some day.

    Paul
    If i fall through the matress I'll see you in the spring
     
     

  11.  
    #10
    BMW Guru
    Car Details
    billywhizz1984's Car Details
    Model of Car:
    E36 323i x 3, 325TDS x 1, 320i x 2
    Year of Manufacture:
    1999, 1998, 1997 x 2, 1996, 1995
    Transmission Type:
    Auto, Auto, Manual, Auto, Auto, Manual
    Car Body Type:
    Touring x 4, Convertible x 6
    billywhizz1984's Avatar
    Join Date
    Sep 2009
    Location
    North East
    Posts
    2,456
    Thanks
    165
    Thanked 925 Times in 701 Posts
    Have a look at my heater box seal replacement guide....

    http://www.bimmerforums.co.uk/forum/...ix-wet-t40364/

    The 4th photo as shows the blower motor cover. You'll need to remove the clips and the fresh air flap control wire to get the cover off. In theory it can be removed in-situ but there isn't a lot of room for manouvere. Good luck and let us know how you get on!
    Last edited by billywhizz1984; 05-04-2010 at 23:32.
     
     

Tags for this Thread

View Tag Cloud

Posting Permissions
  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts