No brake light

Discussion in 'Freightliner Forum' started by Dorego401, Oct 11, 2020.

  1. Dorego401

    Dorego401 Bobtail Member

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    Oct 11, 2020
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    2006 Columbia brake lights not working . Tested no voltage at taillights with brake pedal engaged . I’m under the brake pedal and I see this wire hanging . Can’t find the brake switch ?? Power at brake fuse 8A0144BB-39C5-4869-8B48-5E950895B71B.jpeg 49EB3489-3BF6-491B-8574-C46327B979B5.jpeg C1EF9DDF-82CD-4144-BE9D-A64B1C32C22A.jpeg
     
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  3. Snailexpress

    Snailexpress Road Train Member

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    Brake light switch usually air pressure switch. Somewhere under cover or dashboard.
     
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  4. FozzyNOK

    FozzyNOK Road Train Member

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    That's nothing that came from a factory with the end that jacked up.. stripped and twisted..
     
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  5. Dorego401

    Dorego401 Bobtail Member

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    Oct 11, 2020
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    Still stuck on this . No power at pigtail after jumping all of these switch . Where should I go from here
     

    Attached Files:

  6. RocketyMan

    RocketyMan Medium Load Member

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    I can find you some legitimate wiring with the last 6 of your vin.
     
  7. Dorego401

    Dorego401 Bobtail Member

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    Oct 11, 2020
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    W25487
     
  8. RocketyMan

    RocketyMan Medium Load Member

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    So one thing to note in your T/S is that the SERVICE BRAKE pedal has no switch on it--it is an air pressure switch on the air manifold denoted as STOP LT SW below. It's circuit is denoted as 36 & 36B (A).

    upload_2020-10-15_10-17-8.png


    I would first check out the switch itself and the associated circuits.
    Then you need to check the PDM.
    upload_2020-10-15_10-41-49.png


    Here is where the switch is located--on the bottom right there you see the harness.
    upload_2020-10-15_10-56-56.png


    Here's you PDM:
    upload_2020-10-15_10-59-19.png


    Find the one that says STOP LT:
    upload_2020-10-15_11-1-19.png


    This circuit then goes to your turn sig switch from the PDM that then controls your 39R and 39L (which is your combination lamps):

    upload_2020-10-15_11-25-25.png

    From there you should then be able to find your problem.

    Hopefully that makes sense and then assists you in your trouble-shooting. If not, then I would take your truck to a certified FTL dealer to fix.
     
    daf105paccar and QUALITYTRUCK Thank this.
  9. Dorego401

    Dorego401 Bobtail Member

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    Oct 11, 2020
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    Where could this switch be found? Is It at the actual turn signal itself
    7C3BE764-E4B2-4AF0-824D-47DB8B06AE9D.jpeg
     
  10. RocketyMan

    RocketyMan Medium Load Member

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    QUALITYTRUCK Thanks this.
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