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Brake lights only works one side totally dead other side

scoob_88
scoob_88
in Ford S-Max Club

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Brake lights work only one side totally dead other and the 3rd brake light on rear window not working plus side side lights too,,all bulbs  replaced but still dead? Any ideas cheers 

  • Quote
    • Sad 1


    Fault is most likely with the Body Control Module (BCM)

    Before investigating disconnect the car battery.

    Remove all connectors from the BCM and check for signs of water ingress and corrosion of the plug pins.

  • Quote
    • Like 1

    Or the car has had damage to the rear and there's a wiring fault, check the wiring first, then the BCM

  • Quote

    Check to see if water in boot where spare wheel would usually be I had water there and turned out the door seals weren't tight enough

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