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Mirror Heater Output = Battery Drain

poadb
poadb
in Ford Focus Club

Featured Replies

Hi all

Experiencing a battery drain and I think it may be that my driver door mirror heater is remaining on?

Had it connected to an IDS today and one of the "currently present" fault codes was:

 

B12D8, Circuit Short To Battery or Open

 

Anybody had this before, or know what my options are? Current thinking is just disconnect, but is this as easy as it sounds?

  • Quote
    • Like 1


    That sound more like a general battery "earth" fault to me.  Besides disconnecting/reconnecting the battery I'd also be checking all the earthing straps (both ends) to ensure they are ALL making clean contact where they should be.

  • Quote
    • Like 1
    • Author

    Possibly. I did fit the battery myself.

  • Quote
    • Author

    I checked battery was connected securely.

    The battery was drained again this morning so I have removed FUSE 47 (Heated Exterior Mirrors) to see if that will cure the issue.

  • Quote
    • 2 months later...

    Did you get to the bottom of it as i have same issue 

  • Quote
    • Like 1
    • 4 years later...
    On 8/9/2018 at 9:56 PM, poadb said:

    Hi all

    Experiencing a battery drain and I think it may be that my driver door mirror heater is remaining on?

    Had it connected to an IDS today and one of the "currently present" fault codes was:

     

    B12D8, Circuit Short To Battery or Open

     

    Anybody had this before, or know what my options are? Current thinking is just disconnect, but is this as easy as it sounds?

    I am getting the exact same fault code on forscan, circuit short to battery or open, mirror heater output

  • Quote

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