No brakes lights on 2010 prostar

Discussion in 'International Forum' started by AndyKang, Oct 16, 2019.

  1. AndyKang

    AndyKang Bobtail Member

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    Oct 16, 2019
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    So have a weird puzzle.
    I have searched everywhere but no luck.
    The brake lights do come on when I press the brake pedal down with the “Ignition off position” but when I turn the “Ignition to on position” no brake lights...
    No codes, No fuses blown, replaced the brake switch and pressure switch but no luck.
    Another thing, cruise control won’t disengage when I press the brake pedal, but it does disengage when I press the clutch, so could it be all related?
    Please if someone knows anything, let me know thank you!
     
    Last edited: Oct 16, 2019
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  3. blairandgretchen

    blairandgretchen Road Train Member

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    What about a pressure sensor switch?
     
  4. AndyKang

    AndyKang Bobtail Member

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    Oct 16, 2019
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    Changed it as well.
     
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  5. AndyKang

    AndyKang Bobtail Member

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  6. Bakerman

    Bakerman Road Train Member

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    Does the cruise control disengage when you tap the clutch?
     
  7. AndyKang

    AndyKang Bobtail Member

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    Yes it does. I forgot to mention that sorry.
     
  8. Bakerman

    Bakerman Road Train Member

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    So it sounds like the problem is in the brake light wiring maybe?
     
  9. AndyKang

    AndyKang Bobtail Member

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    Oct 16, 2019
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    There’s like 3 main wires goes to the fuse box, big orange, two tiny ones white and green. I think I’m gonna have to follow the wires all the way across?
    But the thing is, how come they work when the ignition is off? That’s what throws me off.
     
  10. Heavyd

    Heavyd Road Train Member

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    2505670C92, this is part number for the proper brake light switch. Is this what you installed? If so, try to cold boot your body controller by disconnecting the batteries for 2 minutes and retest.
     
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