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Lost rear left turn signal function

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  • Lost rear left turn signal function

    Hey guys

    I have been restoring my rear lamp assemblies. Did the right side first, while keeping the left intact. Everything worked. Now I R/R the left side and now the right side turn signal doesn't work by turn signal switch and hazard switch. Any advice as to how to troubleshoot this?

    THx

    Ryan


  • #2
    I would first.
    1. Swap or test the bulbs.
    2. Pull the socket and ground the crown ring directly to a good ground point to check.
    2. Swap sockets.

    1. If the problem follows the bulb, replace the bulb.
    2. If the direct ground works, then check the socket crown ring connection to the lens hole/frame.
    3. If the problem follows the socket, then look/search to find the socket repair soldering job needed to re-establish the crown rings connection to the bulb ground terminal within the socket.
    https://www.buckeyetriumphs.org/s/TR...ckets-lkgj.pdf
    '74 TR6 CF13007U aka "Mr. T"
    Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
    Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
    Peaks and tweaks, but the spirit of Original
    Redlines always.
    My wife is the Driver, I'm just the Mechanic....

    Comment


    • #3
      tr6harris Thanks! Bad bulb! I can't believe it. I installed all new bulbs after giving the frame, sockets and connectors a thorough cleaning. So strange that it worked on the right side after reinstalling, then once i installed the left side, the right side stopped working. Thought it would be something much more complicated! Thanks again. By the way, this little project really improves the appearance and the brightness of the rear lamps! They look brand new. Highly recommended upgrade, and no need to go to LED's!

      Ryan

      Comment


      • #4
        Good deal.



        For a slight upgrade to the brake lights, you can replace the 1157 with a 2357 bulb. Although interchangeable, the brake filament of the 2357 is brighter, for a safety margin on these little cars.

        I eventually installed the 1157 version of LED bulbs from Litezupp. Match the color LED to the lens. e.g. Red-Red...

        https://litezupp.com/epages/ac0e8cab...061/Categories
        '74 TR6 CF13007U aka "Mr. T"
        Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
        Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
        Peaks and tweaks, but the spirit of Original
        Redlines always.
        My wife is the Driver, I'm just the Mechanic....

        Comment


        • #5
          I spoke too soon!

          Now, after checking all other lamps, the Right side marker, and both tail/brake don't work.

          Rear left side marker, both reverse and both rear turn signals work.

          Supposedly bad right turn signal bulb actually looked ok...filament not toasted, it was brand new.

          Everything worked before with the absolutely FILTHY left side assembly that was in there. Prior to reinstalling the assemblies, I made all connections super clean w/steel wool, copper brush, emery paper, etc.

          I soldered a new ground to the right tail/brake 15 years ago. Not sure why that one is not working now.

          Last edited by blue_bruiser; 09-21-2019, 10:34 PM.

          Comment


          • #6
            Have a stash of replacement bulb sockets...replaced both tail/brake sockets and now the only ones that DON'T work are the Right Brake and Right Rear Side Marker Lamps. Guess I will just continue to replace the single-filament bulb sockets one by one and see what works and what doesn't. I don't have new side marker sockets...haven't even checked to see if they're available

            Comment


            • #7
              Replaced the two "restored" turn signal sockets with new sockets, same new bulbs, nothing changed.

              Replaced the two "restored" reverse sockets with new sockets, same new bulbs, then both turn signals stopped working.

              Put old sockets with new bulbs back in. Turn signals are again functional.

              Replaced new Right Side Marker bulb with the old bulb that was in there before restoration, now Right Side Marker lamp works. Now, the Right side brake filament works, and the Left side brake filament does NOT work. Previously, it was the left brake that worked and the right that did not work.

              Now the only remaining lamp function not working is the Left Brake filament.

              Took NEW tail/brake socket out, and it FELL APART. Copper ground and chrome ring fell off of the plastic body.

              Re-installed original restored socket, with same new bulb.............................................. ........................................

              PLEASED TO REPORT, ALL LAMPS NOW FUNCTIONING AS THEY SHOULD...

              I am now not going to touch anything else in the tail lamp department until something doesn't work again in 5 minutes


              Onwards to the clutch hydraulics overhaul...


              Cheers,

              Ryan



              Comment


              • #8

                Comment


                • #9
                  I think the summary is, new sockets are not the best.......

                  They are more flimsy and I had that crown ring break off one of mine. Stick with the old sockets, clean and ensure that solder repair is done if needed and reuse....

                  Good deal.
                  '74 TR6 CF13007U aka "Mr. T"
                  Custom Blue (Delft-Like) and New Tan (Formerly Mallard and New Tan)
                  Points, Ballast Bypassed, Bosch Blue Coil, Moss Cobalt Wires, Champion RN12YC plugs.
                  Peaks and tweaks, but the spirit of Original
                  Redlines always.
                  My wife is the Driver, I'm just the Mechanic....

                  Comment


                  • #10
                    Well 5 out of the 6 "new" sockets have bestowed working lamps after all that ****. If it becomes a problem after I touch the car again, I will elevate this to a higher-tiered action item as I gotta have all my lights working, and will have a reunion with my soldering iron. Hopefully I can get full clutch action in first and reverse and then, maybe then, I can move on to rebuilding the innards of the doors.

                    Comment

                    Lost rear left turn signal function

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