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  • Brakelight/Turn signal interference

    I have the sequential turn signals. They work great except when my foot's on the brake. Then they stop flashing. I know I'll have to search for and find the probable short in the wiring harness. But just in case, is this a problem anyone is familiar with?



    Thanks.


    Cheers,
    Richard, '66 Thunderbird Hardtop, 390FE, Edelbrock Al heads, Comp cam, Street Demon 650 carb. Visit my restoration blog at hwythunder.com.

  • #2
    Originally posted by HighwayThunder View Post
    I have the sequential turn signals. They work great except when my foot's on the brake. Then they stop flashing. I know I'll have to search for and find the probable short in the wiring harness. But just in case, is this a problem anyone is familiar with?



    Thanks.


    Cheers,

    Would assume you are referring to the turn signal indicators on the fenders when you apply the brakes . The signal lights are or should be working even though the indicators are not . This is a common problem on '65 and '66 birds . The flasher is turning by a motor to activate a ' stepping switch " and the signals will keep flashing but the indicators will stay solid until you let go of the brake, especially when all the lights are on as well .

    Comment


    • #3
      Brakelight/Turn signal interference

      Martin, I think he was speaking of the rear sequentially blinking tail lights and not the front. He may find a bad ground, or something else going on in the sequential blinker system.

      Ray Clark - Squarebirds Administrator
      '59 Tbird "The Yellow Rose Of Texas" aka "Tweety Bird"
      "It's Hip To Be Square"
      Thunderbird Registry #33025 VTCI #11178

      Contact me via Private Message for my email address, or (Cell) 210-875-1411 (Home) 210-674-5781

      http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

      Comment


      • #4
        Originally posted by YellowRose View Post
        Martin, I think he was speaking of the rear sequentially blinking tail lights and not the front. He may find a bad ground, or something else going on in the sequential blinker system.
        Did not read any mention of rear or front signals not working , only that there were no signals when braking , that is usually from the driver seat . if either front or rears are not working , then it is either the flasher " stepping switch " , or the sequential relay . Guess we need more info.

        Hope all is well with you Ray .

        Comment


        • #5
          Brakelight/Turn signal interference

          Hi Martin, I is well, and busy working on the 2019 Squarebirds Calendar. It is at the printers and I will be checking with them on Tuesday to see if it is up to snuff for them to print me a proof copy!

          Ray Clark - Squarebirds Administrator
          '59 Tbird "The Yellow Rose Of Texas" aka "Tweety Bird"
          "It's Hip To Be Square"
          Thunderbird Registry #33025 VTCI #11178

          Contact me via Private Message for my email address, or (Cell) 210-875-1411 (Home) 210-674-5781

          http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

          Comment


          • #6
            Originally posted by YellowRose View Post
            Hi Martin, I is well, and busy working on the 2019 Squarebirds Calendar. It is at the printers and I will be checking with them on Tuesday to see if it is up to snuff for them to print me a proof copy!
            Looking forward to seeing it Ray . Brings back some memories of last years entries .

            Comment


            • #7
              Thank you, OUR5T8BIRD,

              Didn't realize it at the time, but it is just the indicators, not the rear lights. If that is a common problem, is there a common solution -- or is it a design flaw?

              Cheers,
              Richard, '66 Thunderbird Hardtop, 390FE, Edelbrock Al heads, Comp cam, Street Demon 650 carb. Visit my restoration blog at hwythunder.com.

              Comment


              • #8
                It's not really a design flaw as it worked when the car was new. Most likely just wear and tear of the flasher/stepper unit. The expensive fix is to replace the mechanical sequential unit with a solid state unit. Other than that I'd check all the grounds, especially the one in the trunk for the sequential unit. Others on here have had the same issue and have tried various things without success.

                John
                John Pizzi - Squarebirds Administrator

                Thunderbird Registry #36223
                jopizz@verizon.net 856-779-9695

                http://www.squarebirds.org/picture_gallery/TechnicalResourceLibrary/trl.htm

                Comment


                • #9
                  Originally posted by HighwayThunder View Post
                  Thank you, OUR5T8BIRD,

                  Didn't realize it at the time, but it is just the indicators, not the rear lights. If that is a common problem, is there a common solution -- or is it a design flaw?

                  Cheers,
                  As John mentioned in previous post, make sure all your grounds are good . Since yours is a '66, the indicator lights are flat, not like the '64 and '65 which had a bracket on the underside , so it sits flat on a painted surface . When new, there was a small ground wire ( black ) attached to the mounting bolts underneath and then grounded on the inner wall as it came through the hole where the power wire came through. Make sure that it is there and properly grounded . Hope this helps .

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