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  • More PO problems....

    I have been diagnosing and fixing little things here and there from the PO. I had a wring gremlin, found it, i believe I fixed it. Now IM trying to find out why the oil press light comes on and stays on. Well, I found the Light checker unit, unplugged it, and the light goes off. However the brake light stays on. I had an extra wire running into my ignition fuse. I found that that wire is runnign into a plug that is going to the tailights...I cant believe I never saw this before....could it be hard wired by passing the light checker?
    79 XS11 special "Loki" - homemade 4-2 exhaust, pod filters, rebuilt forks with progressive springs, tkat fork brace, progressive shocks, rebuilt all brakes and MC's, rebuilt carbs with #142.5 main and #42.5 pilot, a custom front and chin fairing, and a handmade set of saddlebags....

    09 YZF-R1 " Toothless"

    04 Buell XB12R "Butterfly"

    "I had a name at some point, a birth-name, but now everyone just calls me Wolf...."

    Wolf
    Moto Militia MC

  • #2
    To bypass the 'light checker', connect the blue/yellow and blue wires together to make the taillight work. All the other wires dead-end at the checker, so just make sure they can't short to anything and leave them.
    Fast, Cheap, Reliable... Pick any two

    '78E original owner - resto project
    '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
    '82 XJ rebuild project
    '80SG restified, red SOLD
    '79F parts...
    '81H more parts...

    Other current bikes:
    '93 XL1200 Anniversary Sportster 85RWHP
    '86 XL883/1200 Chopper
    '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
    Cage: '13 Mustang GT/CS with a few 'custom' touches
    Yep, can't leave nuthin' alone...

    Comment


    • #3
      Originally posted by crazy steve View Post
      To bypass the 'light checker', connect the blue/yellow and blue wires together to make the taillight work. All the other wires dead-end at the checker, so just make sure they can't short to anything and leave them.
      +1 that is how i got my tail light warning light to go off with my LED conglomeration... Oil pressure light still works with light checker now living in the tool box
      Don
      1979 XS1100SF "Old Man" bought by my Dad brand new in 79, customized in 80 with Vetter, Standard tank, and touring seat. I inherited in 02 when Dad passed. Been riding it since 09. No resto, bike is a survivor...

      2007 RoadStar 1700 Midnight Silverado "The Black Pearl" Cobra Slash-downs, K&N filter. More mods to come


      old:
      1989 kawi ex500
      1996 yzf-r6
      1999 yzf-r1
      2001 kawi zx-6r
      2000 Ducati 748
      2002 YZF-R1
      2005 V-Star 1100 Classic

      Comment


      • #4
        so u are saying remove the checker from the equation?
        79 XS11 special "Loki" - homemade 4-2 exhaust, pod filters, rebuilt forks with progressive springs, tkat fork brace, progressive shocks, rebuilt all brakes and MC's, rebuilt carbs with #142.5 main and #42.5 pilot, a custom front and chin fairing, and a handmade set of saddlebags....

        09 YZF-R1 " Toothless"

        04 Buell XB12R "Butterfly"

        "I had a name at some point, a birth-name, but now everyone just calls me Wolf...."

        Wolf
        Moto Militia MC

        Comment


        • #5
          I think there are two things being asked here, first is the light checker (RLU), second is the extra wire form the fuse to the tail light.

          The RLU can be eliminated with no detrimental effect to the operation of the bike. Its primary purpose in life is to "monitor" if your healdight is operating in its current hi/low beam setting, and if it fails, switch it to the other setting. Like Steve has stated, to eliminate it, you just need to connect the blue/yellow wire to the blue wire. I did this by cutting the wire connector off the actual RLU and then I removed all the wires from the connector but the blue and blue/yellow. I then soldered those two together with shrink wrap over them. Then replug the connector back into the harness.

          As to your issue with the "extra" wire, what color is the wire in the tail light connector that it runs to?
          Life is what happens while your planning everything else!

          When your work speaks for itself, don't interrupt.

          81 XS1100 Special - Humpty Dumpty
          80 XS1100 Special - Project Resurrection


          Previously owned
          93 GSX600F
          80 XS1100 Special - Ruby
          81 XS1100 Special
          81 CB750 C
          80 CB750 C
          78 XS750

          Comment


          • #6
            The light checker unit (LCU) and the reserve lighting unit (RLU) are two different critters. The RLU is found on all XS11's but the LCU is found only on the 79 Special. Probably because it is the only model with a single tail light bulb.
            2H7 (79) owned since '89
            3H3 owned since '06

            "If it ain't broke, modify it"

            Comment


            • #7
              Originally posted by bikerphil View Post
              The light checker unit (LCU) and the reserve lighting unit (RLU) are two different critters. The RLU is found on all XS11's but the LCU is found only on the 79 Special. Probably because it is the only model with a single tail light bulb.
              That would be my assumption also. The down fall of removing the checker is your tail/brake warning light is now inop... But the oil warning still works.
              Don
              1979 XS1100SF "Old Man" bought by my Dad brand new in 79, customized in 80 with Vetter, Standard tank, and touring seat. I inherited in 02 when Dad passed. Been riding it since 09. No resto, bike is a survivor...

              2007 RoadStar 1700 Midnight Silverado "The Black Pearl" Cobra Slash-downs, K&N filter. More mods to come


              old:
              1989 kawi ex500
              1996 yzf-r6
              1999 yzf-r1
              2001 kawi zx-6r
              2000 Ducati 748
              2002 YZF-R1
              2005 V-Star 1100 Classic

              Comment


              • #8
                Originally posted by bikerphil View Post
                The light checker unit (LCU) and the reserve lighting unit (RLU) are two different critters. The RLU is found on all XS11's but the LCU is found only on the 79 Special. Probably because it is the only model with a single tail light bulb.
                Ahhh...and yet ANOTHER lesson learned. The more I know, the more I find I do not know.
                Life is what happens while your planning everything else!

                When your work speaks for itself, don't interrupt.

                81 XS1100 Special - Humpty Dumpty
                80 XS1100 Special - Project Resurrection


                Previously owned
                93 GSX600F
                80 XS1100 Special - Ruby
                81 XS1100 Special
                81 CB750 C
                80 CB750 C
                78 XS750

                Comment


                • #9
                  Originally posted by DGXSER View Post
                  Ahhh...and yet ANOTHER lesson learned. The more I know, the more I find I do not know.
                  Yeah, it's amazing how many differences there really are between the various models. Mostly small things, but they can trip you up when trying to swap parts....
                  Fast, Cheap, Reliable... Pick any two

                  '78E original owner - resto project
                  '78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
                  '82 XJ rebuild project
                  '80SG restified, red SOLD
                  '79F parts...
                  '81H more parts...

                  Other current bikes:
                  '93 XL1200 Anniversary Sportster 85RWHP
                  '86 XL883/1200 Chopper
                  '82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
                  Cage: '13 Mustang GT/CS with a few 'custom' touches
                  Yep, can't leave nuthin' alone...

                  Comment

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