1st Gen R53 Cooper S Most liked posts in thread: No Power

  1. ddc_anb

    ddc_anb New Member

    Feb 3, 2012
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    #10 ddc_anb, Jun 19, 2013
    I had standing water in there but I didn't see any corrosion. I will check again just to be sure. Thanks for all the great advise!
     
  2. DneprDave

    DneprDave Well-Known Member
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    #6 DneprDave, Jun 18, 2013
    You can start pulling fuses and check the voltage draw after each fuse you pull. Then replace the fuse and pull the next one. When you pull a fuse and the voltage draw goes away, you've found the circuit with the problem.

    Dave
     
  3. Nathan

    Nathan Founder

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    #2 Nathan, Jun 18, 2013
    Welcome, thanks for joining Motoring Alliance, the FUN and Friendly MINI Community.

    Check the fuse box under the bonnet. Sometimes the relays in there can work loose. Make sure they are all firmly in plugged in.
     
  4. Metalman

    Metalman Well-Known Member
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    #3 Metalman, Jun 18, 2013
    Check that "Batt" post connection and ground connection..... They have been known to be culprits resulting in weird electrical issues...
     
  5. ddc_anb

    ddc_anb New Member

    Feb 3, 2012
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    #4 ddc_anb, Jun 18, 2013
    I did a continuity test today.
    When I test from the negative post to ground it says that something is pulling 12+- volts. I had nothing running in the car and the doors were shut.
     
  6. quikmni

    quikmni Moderator

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    #5 quikmni, Jun 18, 2013
    Was the key on of off when you saw the 12V short?

    Start looking around for any power cables that could be rubbing on ground (metal) somewhere. I would check wires leaving the battery compartment and then look around the engine compartment. Have any electrical accessories been added to the car that could be shorting out somewhere because their wiring is not in one of the OEM harnesses?

    Also I have seen the O2 sensor wires wear through the wire insulation where clipped on the bottom of the car but that short should not been seen with the key off.
     
  7. ddc_anb

    ddc_anb New Member

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    #7 ddc_anb, Jun 18, 2013
    How I did it was I had the key off and the doors shut so the I terror lights wouldn't come on. When I would test from negative to ground it would show a 12v drain.
     
  8. CHKMINI

    CHKMINI Club Coordinator
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    #8 CHKMINI, Jun 18, 2013
    Check the jump stud post and connection in the small black box next to the ECU. These have been known to come loose and/or corrode.
     
  9. papa-j

    papa-j Active Member
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    #9 papa-j, Jun 18, 2013
    Hi - To rule out something that happened to my 2004 R53, When you are in the battery well look to be sure there was no water standing down in there. Last year I found there had been a lot of water standing in mine and it caused plenty trouble.
    It had corroded a bus bar in that orange distribution block next to the battery. The degree of corrosion on the bars wasn't visible until popping open the cover (per image).
     

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