2009 Ultra Brake Lamp Issue

Discussion in 'Touring Models' started by AJ1955, Jul 25, 2011.

  1. AJ1955

    AJ1955 New Member

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    Hey Guys, I am new to this site. While riding I got a check engine light, which after diagnosing showed to be a P0572 code. That is how and when I noticed that my brake lamp is stuck on. After clearing the code, the brake lamp returned to normal only for a few minutes. Visually checked the bulb, all looks ok, but is stuck on. Any ideas?
     
  2. Hoople

    Hoople Account Removed

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    Bad rear hydraulic switch. Pull the wires and check switch a meter. Happened to my 2009 Dyna.
     
  3. dbmg

    dbmg Experienced Member

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  4. AJ1955

    AJ1955 New Member

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    Thanks for the responses. No mods, strictly stock with 11.5K miles. I'm thinking faulty switch. After tracing all lines and checking connectivity, bike starts up and works fine. 3 or 4 minutes into ride, brake light begins sticking on. After cooling, works fine until heating up.
    Of course warranty has ran out.
     
  5. Hoople

    Hoople Account Removed

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    Check continuity on the rear hydraulic switch. There is a good chance you will measure several K-ohms of resistance when you should measure infinity. When brake fluid enters the electrical portion of the switch, problems begin. With you meter hooked up, tap the rear peddle a few times (also press hard). Use your 200K ohm scale. Bet you see that it does not toggle to infinity.

    Few months back there were threads with the same problem & pictures as yours.
     
  6. bamorris2

    bamorris2 Member

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    I had the exact same problem (and same code) about 2 months ago. It was the rear brake light switch. Dealer replaced it under extended warranty. No problems since.
     
  7. AJ1955

    AJ1955 New Member

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    Well, it was the same problem as bamorris2 had, rear brake light switch. No extended warranty, but dealer fix was very reasonable (for Harley)
    Thanks to all.