2004 330cd - what does this white box control (boot fixture)

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  1. 2004 330cd - what does this white box control (boot fixture) 
    #1
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    mal330cd's Car Details
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    Hello

    I'm seeking a little help please....

    I need to know what this box in my coupe boot controls and also what the blue/brown cable does?

    Thanks!

     
     

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    Some form of joint box... I take it theres 3 separate compartments which are insulated from each other so i dont know what its for apart from an easy way to tap of the positive of the battery...?
     
     

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    mal330cd (07-03-2010)

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    The white box is a fuse box, those are fuses.

    The broken wire is for the safety battery terminal. In the event of an accident it releases and disconnects the live cable from the battery preventing fires. I'm guessing you have an MRS light on!
     
     

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    mal330cd (07-03-2010),xXNealXx (07-03-2010)

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    Thanks for the input. I cut the wires thinking that they were for the rear speakers , in my defence the rear speaker cable is a blue/brown twisted wire however it is slightly thicker. Since cutting it and resoldering, the airbag warning light remains on.
     
     

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    Quote Originally Posted by Mostly Harmless View Post
    The white box is a fuse box, those are fuses.

    The broken wire is for the safety battery terminal. In the event of an accident it releases and disconnects the live cable from the battery preventing fires. I'm guessing you have an MRS light on!
    Ooh, this is more promising. Yes, I have the SRS light on, what's MRS? Have I caused damage cutting the wire - i.e will the airbag still deploy and remain operational now that the wires have been reconnected together? Is it a case of getting the dealer to clear the light?
     
     

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    Sorry yeah, MRS is SRS is Airbags..

    When you repair the wire make sure you do a good job as the control unit will measure resistance on those wires to check the component. The airbag light will need to be reset by a dealer/independant etc
     
     

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    Great, thanks for your help. I did a pretty good repair job but I shall double check it tomorrow.

    Can it be reset by purchasing, http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT, or is it best to get it done at my local indie?

    Next time I shall be leaving all things electrical to someone that knows what they're doing! So, am I correct in thinking that the function of cutting the live feed to the battery/deploying the airbag will remain operational if I've patched these cable together correctly My g/f drives the car a lot so I want to ensure we're protected should anything happen.

    Thanks for the help
     
     

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    Good stuff MH
     
     

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    The power of a good forum hey?! No one else seems to know what it does then MH comes along to set the record straight!
     
     

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    #10
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    Quote Originally Posted by mal330cd View Post
    Great, thanks for your help. I did a pretty good repair job but I shall double check it tomorrow.

    Can it be reset by purchasing, http://cgi.ebay.co.uk/ws/eBayISAPI.d...=STRK:MEWAX:IT, or is it best to get it done at my local indie?

    Next time I shall be leaving all things electrical to someone that knows what they're doing! So, am I correct in thinking that the function of cutting the live feed to the battery/deploying the airbag will remain operational if I've patched these cable together correctly My g/f drives the car a lot so I want to ensure we're protected should anything happen.

    Thanks for the help
    I don't really have much experience of OBD2, however I thought it was only for engine codes.. maybe someone can advise you better on this one?

    As for the airbag operation, as long as the light is on the whole system is de-activated.
     
     

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