2000 E46 328ci SE - Heated seats indicator lights up then turns off

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  1. 2000 E46 328ci SE - Heated seats indicator lights up then turns off 
    #1
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    Hi,

    I have a problem on the E46 where both front seat heaters do not work. Press the switch and the 3 LED's next to it light up for around 2 seconds then turns straight off. The same happens on both seat switches so unsure if its heater pad in the seat

    Any diagnostic help would be much appreciated

    Thanks
     
     

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    i find it unusual that both seats would fail!!, are you sure there isn't an electrical fault in the wiring loom that feeds, earths both switches?
     
     

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    Thanks for the quick reply vauxfan - I'm comforted that you agree both seats failing would be pretty rare. It means its much more probable to fix it

    I have no knowledge of the loom so will have to check the wiring diagram. I can check the heater pads for continuity/resistance and work backwards.

    Are there any common gremlins on heated seats and do you know how the rear heater pad is connected to the seat heater pad?
     
     

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    Quote Originally Posted by sophos9 View Post
    Thanks for the quick reply vauxfan - I'm comforted that you agree both seats failing would be pretty rare. It means its much more probable to fix it

    I have no knowledge of the loom so will have to check the wiring diagram. I can check the heater pads for continuity/resistance and work backwards.

    Are there any common gremlins on heated seats and do you know how the rear heater pad is connected to the seat heater pad?
    i don't know of any gremlins on the bmw?, even the old vauxhall heated leather seats were quite good, and they were poorer quality! must be a wireing short or some thing?
     
     

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    Yea - had the same problem on a Calibra, it was the connection between the seat and back element which was fixed. Omega Elite, switch turned on but drivers seat never got warm - element tested and proved open loop.

    I'll get the multimeter out tomorrow night and trace back - I like electrical problems :
     
     

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    Quote Originally Posted by sophos9 View Post
    Yea - had the same problem on a Calibra, it was the connection between the seat and back element which was fixed. Omega Elite, switch turned on but drivers seat never got warm - element tested and proved open loop.

    I'll get the multimeter out tomorrow night and trace back - I like electrical problems :
    actually quite liked the cav/calibra leathers, not really bucket seats, but still a good effort!
    let us know how you get on? might need your findings 1 day

    out of intrest what calibra did you have? redtop? cally turbo? v6? 8v
     
     

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    Quote Originally Posted by vauxfan View Post
    actually quite liked the cav/calibra leathers, not really bucket seats, but still a good effort!
    let us know how you get on? might need your findings 1 day
    Will do dude, I'll keep this thread updated

    Quote Originally Posted by vauxfan View Post
    out of intrest what calibra did you have? redtop? cally turbo? v6? 8v
    It was a X25XE in it, green with cream leather
    Also had...
    X25XE Vectra
    X30XE Vectra
    X30XE Omega
    X20XE Vectra
    Z22SE Vectra

    The Z22SE I have is a minter, low miles with Courtenays lightened flywheel, sports clutch, modified head..

    but the BMW is much much nicer
     
     

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    Quote Originally Posted by sophos9 View Post
    Will do dude, I'll keep this thread updated



    It was a X25XE in it, green with cream leather
    Also had...
    X25XE Vectra
    X30XE Vectra
    X30XE Omega
    X20XE Vectra
    Z22SE Vectra

    The Z22SE I have is a minter, low miles with Courtenays lightened flywheel, sports clutch, modified head..

    but the BMW is much much nicer
    nice!!, quite liked that combo!, did you have the 3l inlet cams fitted? or was it standard.
     
     

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    Was standard but I did hear the 3ltr cams makes good difference in the X25XE
     
     

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    Quote Originally Posted by sophos9 View Post
    Was standard but I did hear the 3ltr cams makes good difference in the X25XE
    only the inlet and a remap, 196bhp. the alternative to the courtnay sport flywheel was an xe fly at iirc 5.5 kg.
     
     

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