Power still on when battery disconnected?

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  1. Power still on when battery disconnected? 
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    Just curious - I disconnected the negative terminal while working on the power windows, and i noticed the interior light was still on.
    So I went back and diconnected the positive terminal also...the light was still on. I could even listen to the radio.
    Any explanation?? should i be worried when doing electrical work on the car?
    e46 318i 2003.
     
     

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    Quote Originally Posted by yeah1526 View Post
    Just curious - I disconnected the negative terminal while working on the power windows, and i noticed the interior light was still on.
    So I went back and diconnected the positive terminal also...the light was still on. I could even listen to the radio.
    Any explanation?? should i be worried when doing electrical work on the car?
    e46 318i 2003.
    Was the car running when you disconnected it?

    Driven by experience and pleasure
     
     

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    Quote Originally Posted by Dez-Derek View Post
    Was the car running when you disconnected it?
    of course not
     
     

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    Quote Originally Posted by yeah1526 View Post
    of course not
    It's not unheard of. My dad's friend took the battery out of his car and put it in my dad's car when his battery was dead. My dad's friend's car was still running and drove home without a battery. But I'm talking ages ago when there wasn't a lot of electrics in cars.

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    It was most likely residual current in the car.
    I allways grab each battery lead with my hand to let any residual current go to ground.
    Also no electrical work should really be done until a few minutes has passed after disconnecting the battery.
     
     

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