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  • Tail light problem

    OK, so i've got this US import Standard, and everything works apart from the tail light. The brake light works, headlight works, but no tail light. It's doing my head in. Where am i going wrong? Why do two wires, a brown and green, come out of the loom at the same place as the tail light wires but not go to anything?

  • #2
    Thise wires are spares/extras for signal lights that could be mounted on your bags, etc. Don't remember which one is for right or left, ground completes the loop.
    It would help if you tell us what year is that standard import.
    1980G Standard, Restored
    Kerker 4 - 1
    850 Rear End Mod
    2-21 Flashing LED Arrays on either side of license plate for Brake Light Assist, 1100 Lumen Cree Aux Lights,
    Progressive springs, Showa rear shocks
    Automatic CCT
    1980GH Special, Restored
    Stock Exhaust, New Handlebars, 1" Spacer in Fork Springs, Automatic CCT, Showa Rear Shocks
    '82 XJ1100 (Sold)
    Automatic CCT, RC Engineering 4 X 1 Exhaust, K&N Pods, #50 Pilot Jets, YICS Eliminator. Sorely missed.

    Comment


    • #3
      On the XS the Brown and green are turn signal wires if I remember right. Don't know about the FJ. Sure on of the guys here will know for sure.
      wingnut
      81 SH (Daily Ride)
      81 650XJ (Brother in laws bike, Delivered)
      81 650XJ Jane Doe (Son's Ride)
      82 750XJ Project bike (Son in law's future ride)
      81 XS 400

      No man has a natural right to commit aggression on the equal rights of another; and this is all from which the laws ought to restrain him.”

      A government big enough to give you everything you want, is strong enough to take everything you have.

      Thomas Jefferson

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      • #4
        Originally posted by Cobia View Post
        Thise wires are spares/extras for signal lights that could be mounted on your bags, etc. Don't remember which one is for right or left, ground completes the loop.
        It would help if you tell us what year is that standard import.
        It's a 1978 2H7.

        Comment


        • #5
          Opps sorry just look at the handle instead for the signature
          wingnut
          81 SH (Daily Ride)
          81 650XJ (Brother in laws bike, Delivered)
          81 650XJ Jane Doe (Son's Ride)
          82 750XJ Project bike (Son in law's future ride)
          81 XS 400

          No man has a natural right to commit aggression on the equal rights of another; and this is all from which the laws ought to restrain him.”

          A government big enough to give you everything you want, is strong enough to take everything you have.

          Thomas Jefferson

          Comment


          • #6
            For the tail lights on a 78, it looks like you need the blue wires.

            Before you start tracing too far into the harness, do the lights come on for the speedometer and the front running lights?

            These are on the same circuit, so it could give some idea if you just have a break in the wiring to your tail lights, or if the whole circuit is dead.

            wiring diagram:
            http://cycles.evanfell.com/wp-conten...-1978-1979.jpg
            John (XSive_Speed)

            '80 XS1100G Standard
            - 4 - 1 exhaust (probably Mac)
            - UNI air filter

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            • #7
              Originally posted by XSive_speed View Post

              do the lights come on for the speedometer and the front running lights?

              These are on the same circuit, so it could give some idea if you just have a break in the wiring to your tail lights, or if the whole circuit is dead.

              wiring diagram:
              http://cycles.evanfell.com/wp-conten...-1978-1979.jpg
              Yes mate, everything works apart from the tail light. So do i need the indicators wiring in?

              Comment


              • #8
                The 'chocolate' (left turn) and 'dark green' (right) extra wires at the taillight were for the turn signals if installing the factory-optional bags. These came with a signal bracket that attached to the license plate mount. The bike came 'pre-wired' for this....
                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...

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                • #9
                  So it looks more and more likely that i'm going to be tearing into the loom and trace that blue wire.
                  Oh well, thanks for the quick replies.

                  Comment


                  • #10
                    Originally posted by FJ111200 View Post
                    So it looks more and more likely that i'm going to be tearing into the loom and trace that blue wire.
                    Oh well, thanks for the quick replies.
                    isn't the blue wire an extra hot?
                    Nathan
                    KD9ARL

                    μολὼν λαβέ

                    1978 XS1100E
                    K&N Filter
                    #45 pilot Jet, #137.5 Main Jet
                    OEM Exhaust
                    ATK Fork Brace
                    LED Dash lights
                    Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                    Green Monster Coils
                    SS Brake Lines
                    Vision 550 Auto Tensioner

                    In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                    Theodore Roosevelt

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                    • #11
                      I hope I'm correct, but the "blue" is another hot and is used for rear daytime running lights. Need to go back through my notes, but I recently installed running lights on the rear (red lense) and also have the working rear turn signals also. Mine is an XJ

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                      • #12
                        The blue is the taillight, the gray is the brake light, the black is ground. There's 'spares' of all these at the taillight in case an owner wanted to install additional lights.
                        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


                        • #13
                          Thanks for the input lads.

                          Comment


                          • #14
                            Originally posted by Jamie View Post
                            ...rear daytime running lights.
                            Ummm... No such thing on ANY vehicle. They're called tail lights. As with all vehicles, they come on with the headlight.
                            1980 XS850SG - Sold
                            1981 XS1100LH Midnight Special (Sold) - purchased 9/29/08
                            Fully Vetterized and Dynojet Kit added, Heated Grips, Truck-Lite LED headlight, Accel Coils, Irridium plugs, TKAT Fork Brace, XS850LH Final Drive & Black SS Brake lines from Chacal.
                            Here's my web page devoted to my bike! XS/XJ User's Manuals there, and the XJ1100 Service Manual and both XS1100 Service manuals (free download!).

                            Whether you think you can, or you think you cannot - You're right.
                            -H. Ford

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                            • #15
                              Originally posted by CatatonicBug View Post
                              Ummm... No such thing on ANY vehicle. They're called tail lights. As with all vehicles, they come on with the headlight.
                              Running lights, tail lights, same thing, different section of the vehicle.....
                              Nathan
                              KD9ARL

                              μολὼν λαβέ

                              1978 XS1100E
                              K&N Filter
                              #45 pilot Jet, #137.5 Main Jet
                              OEM Exhaust
                              ATK Fork Brace
                              LED Dash lights
                              Ammeter, Oil Pressure, Oil Temp, and Volt Meters

                              Green Monster Coils
                              SS Brake Lines
                              Vision 550 Auto Tensioner

                              In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.

                              Theodore Roosevelt

                              Comment

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