2002 e46 320d saloon keeps blowing heater fuse 63

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  1. 2002 e46 320d saloon keeps blowing heater fuse 63 
    #1
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    seany108's Car Details
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    hi guys my problem started yesterday for no apparent reason the heater went off i checked the fuse board and it blew number 63 i have replaced the fuse 4 times 3 times with the 7.5 then i placed a 10 in which also blew any ideas ?
    Last edited by mark@vorny.co.uk; 17-10-2010 at 19:10.
     
     

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    thepurpleblob's Car Details
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    Quote Originally Posted by seany108 View Post
    hi guys my problem started yesterday for no apparent reason the heater went off i checked the fuse board and it blew number 63 i have replaced the fuse 4 times 3 times with the 7.5 then i placed a 10 in which also blew any ideas ?
    At the risk of stating the obvious, *something* covered by that fuse has gone short circuit. Really, you need a circuit diagram and to disconnect whatever is there one-by-one until the fuse doesn't blow any more. Then you know what to replace. It could also be a chaffed wire in a loom but (unless you know different) that's unlikely.

    The "final stage resistor" or "hedgehog" seems a popular failure point but I couldn't find anybody complaining about it shorting. If you're stuck I (and I'm sure others) have the wiring diagrams on a laptop at home and can give you a list of things to unplug if it helps.
     
     

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    beema_geeza's Car Details
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    Quote Originally Posted by seany108 View Post
    hi guys my problem started yesterday for no apparent reason the heater went off i checked the fuse board and it blew number 63 i have replaced the fuse 4 times 3 times with the 7.5 then i placed a 10 in which also blew any ideas ?
    Hi Im auto elec in Sutton Coldfield I can diagnose and rectify for you
    cheers
    www.nwautoelectrics.co.uk
     
     

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    Diagrams show fuse 63 protects the circuit for the air con solenoid clutch and heating/air con control module on the dash
     
     

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