Parking lights on with brakes

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  • Frank G
    232 I6
    • Apr 20, 2011
    • 120

    Parking lights on with brakes

    Hello all,
    Iv just noticed that my parking lights(amber lights) in the front activate when
    I apply my brakes.

    Not sure if this is gonna be a quick fix or an electrical nightmare?

    87 Jeep Grand Wagoneer 360v8

    Thanks in advance
    Frank G
    Frank G
    16 X Jeep Owner

    19 WK2 Limited X -Daily Driver
    15 WK2 Altitude-Wife's
    05 WK Laredo 4.7l, Leather, Tow(Reinherited/orig owner )
    94 ZJ Laredo - 5.2l , Leather, Tow
    87 SJ - Restored / Survivor
    86 XJ Laredo - Survivor (Dad bought new in 85)
    44 Willy's MB -Restored

    Previous Jeeps: ALL MISSED
    15 WK Limited 14 WK Limited 09 KK Limted 11 WK2 Laredo 08 JK Sahara 01 WJ Laredo 97 XJ Sport 95 XJ Sport 84 XJ Chief
  • wiley-moeracing
    350 Buick
    • Feb 15, 2010
    • 1430

    #2
    can be as simple as a bad bulb the has a filament shorting or a bad ground.

    Comment

    • Driftwood
      350 Buick
      • Jun 12, 2000
      • 959

      #3
      I had similar issues after I replaced all of my exterior filament type bulbs with LEDs. Out of frustration trying to troubleshoot assumed cross shorts, I swapped everything back to filaments.
      Problem fixed.
      1979 Wagoneer

      Comment

      • tgreese
        • May 29, 2003
        • 11682

        #4
        If this were my Jeep, I would check and reseat all the grounds first. Strange behavior in these circuits can result from back-feeding of current through other parts of the circuit when the ground is lifted.

        Next I would look at the connections in the steering column, and test at the steering column connector. I'd also spray some contact cleaner in the steering column indicator and flasher switches, and exercise them. I believe the brake lights and the turn signals go through there, and the switch in the column manages what is bright and what flashes.

        I would also pull apart all the connectors and clean them with contact cleaner. I'd likely do this at the same time that I reseated the grounds.

        I'd test all the bulbs and clean their sockets and bases.

        That's it for what you can do without actually measuring voltages in the circuit.

        Then I would start with the circuit diagram and my multimeter and start measuring and tracing through the suspect circuits. You have to have the Jeep in front of you to do this - not much help can be provided online.
        Tim Reese
        Maine beekeeper's truck: '77 J10 LWB, 258/T15/D20/3.54 bone stock, low options (delete radio), PS, hubcaps.
        Browless and proud: '82 J20 360/T18/NP208/3.73, Destination ATs, 7600 GVWR
        Copper Polly: '75 CJ-6, 304/T15, PS, BFG KM2s, soft top
        GTI without the badges: '95 VW Golf Sport 2000cc 2D
        ECO Green: '15 FCA Jeep Cherokee KL Trailhawk

        Comment

        • Frank G
          232 I6
          • Apr 20, 2011
          • 120

          #5
          Thank you for all the replies especially Tim.

          I actually think I solved the problem I noticed there was an 1156 where there should have been an 1157 bulb. When I put in the proper bulb the parking brake light issue went away.

          But now I noticed during the inspection that the top bulbs both right and left don’t light up for anything again this is probably an old issue not a new issue that I just discovered the middle brake lights work fine but for whatever reason the rear top brake lights now don’t work. Typical Wagoneer problem solving fix one issue find 10 others. LOL
          Last edited by Frank G; 09-25-2020, 01:01 PM.
          Frank G
          16 X Jeep Owner

          19 WK2 Limited X -Daily Driver
          15 WK2 Altitude-Wife's
          05 WK Laredo 4.7l, Leather, Tow(Reinherited/orig owner )
          94 ZJ Laredo - 5.2l , Leather, Tow
          87 SJ - Restored / Survivor
          86 XJ Laredo - Survivor (Dad bought new in 85)
          44 Willy's MB -Restored

          Previous Jeeps: ALL MISSED
          15 WK Limited 14 WK Limited 09 KK Limted 11 WK2 Laredo 08 JK Sahara 01 WJ Laredo 97 XJ Sport 95 XJ Sport 84 XJ Chief

          Comment

          • Brynjminjones
            258 I6
            • Jun 11, 2017
            • 475

            #6
            On my '91, the top red lights are just turn signals, they don't light up when I brake.
            As far as I'm aware that's how they're supposed to work
            1991 Grand Wagoneer - Hunter Green. All stock. Rebuilt 360, .030" over with Melling MTA-1 cam.

            1998 Cherokee (XJ) 4.0
            1997 Grand Cherokee (ZJ) 4.0
            1974 Ford F100 390

            Comment

            • Frank G
              232 I6
              • Apr 20, 2011
              • 120

              #7
              Originally posted by Brynjminjones
              On my '91, the top red lights are just turn signals, they don't light up when I brake.
              As far as I'm aware that's how they're supposed to work
              Yea I must be an idiot !!! Your correct they are turn signals. (Duh)

              It’s funny when you start looking so deep for problems you ignore the obvious.

              So I guess for now my lighting problems are fixed. Thanks as always for all the replies.
              Last edited by Frank G; 09-26-2020, 03:25 AM.
              Frank G
              16 X Jeep Owner

              19 WK2 Limited X -Daily Driver
              15 WK2 Altitude-Wife's
              05 WK Laredo 4.7l, Leather, Tow(Reinherited/orig owner )
              94 ZJ Laredo - 5.2l , Leather, Tow
              87 SJ - Restored / Survivor
              86 XJ Laredo - Survivor (Dad bought new in 85)
              44 Willy's MB -Restored

              Previous Jeeps: ALL MISSED
              15 WK Limited 14 WK Limited 09 KK Limted 11 WK2 Laredo 08 JK Sahara 01 WJ Laredo 97 XJ Sport 95 XJ Sport 84 XJ Chief

              Comment

              • Brynjminjones
                258 I6
                • Jun 11, 2017
                • 475

                #8
                Originally posted by Frank G
                It's funny when you start looking so deep for problems you ignore the obvious.
                This sounds just like me haha! I'm always looking for big, complex problems when usually I've just screwed up something simple.
                1991 Grand Wagoneer - Hunter Green. All stock. Rebuilt 360, .030" over with Melling MTA-1 cam.

                1998 Cherokee (XJ) 4.0
                1997 Grand Cherokee (ZJ) 4.0
                1974 Ford F100 390

                Comment

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