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Brake light out indicator on but brake lights OK

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    Brake light out indicator on but brake lights OK

    92 LX - I have intermittent dash display indicating a brake light out. But a check of the brake lights indicate that they are working properly. Is there a common loose connection/ground somewhere that I can fix? Thanks.

    #2
    Hello friend, welcome to the site

    This is a common problem, there are brown and black "sensor" boxes mounted into the rear outer tail lamps and they tend to go bad, or at least have poor connections.

    If you want to try restoring the functionality, make sure your tail light bulb sockets and related connectors are shiny and clean. It is common for the bulb sockets to get corroded, creating a false "disconnected" signal that the sensor box is incorrectly triggered by.

    You can also try replacing the boxes, but the new ones you get might also be bad. If you know how to solder, you can open the boxes up and re-solder all of the connection points on the circuit board, because sometimes the original solder joints fail from heat and vibration over the years, causing the same "disconnected" signal.

    If all else fails, there is a trick to bypass this circuit entirely to make the dashboard light stay OFF - you can see the simple wiring change in the picture below. This change is performed on the driver side outer tail lamp, at the brown box.



    In case it isn't clear or the picture gets lost: you cut (or de-pin) the White/Green wire (white with a green stripe), and connect it - the harness side - to the Black ground wire.
    Last edited by cp[mike]; 12-09-2019, 04:36 PM.


    - 1993 Accord LX - White sedan (sold)
    - 1993 Accord EX - White sedan (wrecked)
    - 1991 Accord EX - White sedan (sold)
    - 1990 Accord EX - Grey sedan (sold)
    - 1993 Accord EX - White sedan (sold)
    - 1992 Accord EX - White coupe (sold)
    - 1993 Accord EX - Grey coupe (stolen)
    - 1993 Accord SE - Gold coupe (sold)
    Current cars:
    - 2005 Subaru Legacy GT Wagon - Daily driver
    - 2004 Chevrolet Express AWD - Camper conversion

    Comment


      #3
      on my 92 EX I was changing the bulbs out for new ones. I got some of them backwards and it set off the brake light out the same way. the ones that are backwards are dimmer.

      Comment


        #4
        Verifying the correct wire is white w/ green stripe? I grounded that wire and no change. Any ideas what could be the issue?

        Comment


          #5
          Originally posted by underPSI View Post
          Verifying the correct wire is white w/ green stripe? I grounded that wire and no change. Any ideas what could be the issue?
          You just made me realize that my information listed above is misleading.

          The actual wire that you need to ground is WHITE with a GREEN STRIPE.
          Some of the information suggested that it was a green wire with a white stripe, which is not true.

          Make sure you grounded the correct one?


          - 1993 Accord LX - White sedan (sold)
          - 1993 Accord EX - White sedan (wrecked)
          - 1991 Accord EX - White sedan (sold)
          - 1990 Accord EX - Grey sedan (sold)
          - 1993 Accord EX - White sedan (sold)
          - 1992 Accord EX - White coupe (sold)
          - 1993 Accord EX - Grey coupe (stolen)
          - 1993 Accord SE - Gold coupe (sold)
          Current cars:
          - 2005 Subaru Legacy GT Wagon - Daily driver
          - 2004 Chevrolet Express AWD - Camper conversion

          Comment


            #6
            Originally posted by cp[mike] View Post
            You just made me realize that my information listed above is misleading.

            The actual wire that you need to ground is WHITE with a GREEN STRIPE.
            Some of the information suggested that it was a green wire with a white stripe, which is not true.

            Make sure you grounded the correct one?
            Yes, I grounded the correct wire. The smaller gauge wire made me question which wire is correct and verified after checking the wiring diagram in a Chilton's manual. White w/ green stripe goes to cluster. Green w/ white stripe goes to 3rd brake light then to Right side.

            What's odd about mine is the black box is on the left side and brown is on the right. Both sides have a white w/ green stripe. I tried both sides independently without results. I've come to terms that I'm just going to have to remove the cluster and take out the bulb.

            Comment


              #7
              Originally posted by ly7244 View Post
              92 LX - I have intermittent dash display indicating a brake light out. But a check of the brake lights indicate that they are working properly. Is there a common loose connection/ground somewhere that I can fix? Thanks.
              In addition to checking the wiring, I would check your brake fluid reservoir. I know on almost all my cars if the fluid is low, the light will come on and if it's on the border, it will intermittently turn on and off like you're experiencing.

              Comment


                #8
                If you have water leaks around the tail lights, that can cause the issue as well.
                90 LX 4dr 5 spd 396,014 (sold 1/1/2022) - MRT: http://www.cb7tuner.com/vbb/showthread.php?t=201450
                08 Element LX FWD AT 229,000 - MRT: fleetw00d : 2008 Honda Element LX - CB7Tuner Forums

                Comment


                  #9
                  Have you checked your brake fluid level and/or the fluid level sensor? It lights up the same dash light as the brake lights.

                  Click for my Member's Ride Thread
                  Originally posted by Stephen Fry
                  'It's now very common to hear people say, "I'm rather offended by that", as if that gives them certain rights. It's no more than a whine. It has no meaning, it has no purpose, it has no reason to be respected as a phrase. "I'm offended by that." Well, so fucking what?' —Stephen Fry
                  Eye Level Media - Commercial & Automotive Photography: www.EyeLevelSTL.com

                  Comment


                    #10
                    Originally posted by steelbluesleepR View Post
                    Have you checked your brake fluid level and/or the fluid level sensor? It lights up the same dash light as the brake lights.
                    Low brake fluid level will illuminate the "brake lamp" light? Sure it's not the "brake" light?

                    Comment


                      #11
                      Originally posted by underPSI View Post
                      Low brake fluid level will illuminate the "brake lamp" light? Sure it's not the "brake" light?
                      agreed, there is some confusion here.

                      BRAKE indicator at the top (in the cluster of indicators):
                      - parking brake is engaged, or
                      - brake fluid is low

                      BRAKE LAMP indicator at the bottom (in the little car door diagram):
                      - brake light is burnt out, or
                      - the sensor box (or the wiring) burnt out


                      the fix listed in this thread covers the BRAKE LAMP warning light.


                      - 1993 Accord LX - White sedan (sold)
                      - 1993 Accord EX - White sedan (wrecked)
                      - 1991 Accord EX - White sedan (sold)
                      - 1990 Accord EX - Grey sedan (sold)
                      - 1993 Accord EX - White sedan (sold)
                      - 1992 Accord EX - White coupe (sold)
                      - 1993 Accord EX - Grey coupe (stolen)
                      - 1993 Accord SE - Gold coupe (sold)
                      Current cars:
                      - 2005 Subaru Legacy GT Wagon - Daily driver
                      - 2004 Chevrolet Express AWD - Camper conversion

                      Comment


                        #12
                        Originally posted by cp[mike] View Post
                        agreed, there is some confusion here.

                        BRAKE indicator at the top (in the cluster of indicators):
                        - parking brake is engaged, or
                        - brake fluid is low

                        BRAKE LAMP indicator at the bottom (in the little car door diagram):
                        - brake light is burnt out, or
                        - the sensor box (or the wiring) burnt out


                        the fix listed in this thread covers the BRAKE LAMP warning light.
                        ope, sorry, my bad. It's been too long since I've driven my CB

                        Click for my Member's Ride Thread
                        Originally posted by Stephen Fry
                        'It's now very common to hear people say, "I'm rather offended by that", as if that gives them certain rights. It's no more than a whine. It has no meaning, it has no purpose, it has no reason to be respected as a phrase. "I'm offended by that." Well, so fucking what?' —Stephen Fry
                        Eye Level Media - Commercial & Automotive Photography: www.EyeLevelSTL.com

                        Comment

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