E36 325 TDS Brake light strange problem (FIXED) - Page 2

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Thread: E36 325 TDS Brake light strange problem (FIXED)

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    #11
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    To be honest no.

    I have no wiring diagram for the car in question but normaly i5s hard wired, safety features should not be connected via any computor or logic controler to keep things simple and less prone to failure.

    However, BMW do some fancy stuff now, as do most manufcactorers in the last few yesrs. Electric connections are all done via a network (CAN Open) and nothing is hard wired now. By changing the software code in the can bus master controler you can make any thing do anything. If you want the lights to flash 4 times if your hand brake is off and you lock the door, no problem just ad a line of code, etc. So it wouldnt shock me to find BMW have told the brake lights only to light for a few seconds after the car becomes stationary so you dont get dazzled behind it in traffic or something.

    Also be aware, many cars now switch the earth not the live (Synch switching) so you need to make sure the earth you use with your test meter is the one in the bulb holder not the cars chassis in general.

    If you are in the midlands pop it to me I will sort you out
     
     

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    #12
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    Ah, Lincoln, Multi map says your 97 miles away :(
     
     

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    #13
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    Good work mrbarry

    Very kind gesture there too
     
     

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    Sorted!!!! It was the brake light switch in the end!! Still dont get how it can have been sending 12v yet not lighting the buld but hey!!! Took the connector off the pedal and bridged the two brake light wires, the other two are for the on-board cmputer and hey presto!!! Quite surprised, GSF stocked them and only 11 quid so, jobs a goodun. Thanks for all your help.
     
     

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    #15
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    Quote Originally Posted by michaelreddo View Post
    Sorted!!!! It was the brake light switch in the end!! Still dont get how it can have been sending 12v yet not lighting the buld but hey!!! Took the connector off the pedal and bridged the two brake light wires, the other two are for the on-board cmputer and hey presto!!! Quite surprised, GSF stocked them and only 11 quid so, jobs a goodun. Thanks for all your help.
    Excellent, A very big WELL DONE to you
     
     

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    #16
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    I kinda knew it was switch. Very common, thats why I advised using a bulb as your test meter so it would load the switch
    Glad its sorted!
     
     

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