L.E.D. conversion question

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  • justme1100
    XStremely XSive
    • Jul 2008
    • 243
    • Eagle, WI

    #1

    L.E.D. conversion question

    There is so much in here about this I am having a hard time finding what I need so I will ask specifically regarding my 82 XJ. I have installed 1157 LED tail/brake light bulbs. I am looking for info on how or what to use so my info center will recognize that the tail light is working. I converted my rear directionals to LED (front are still standard bulbs) and have extra LED lights on either side of the tail light for brake lights. I have also added (2)55w driving lights and headlight is 55w/100w with no problems (so far, knock on wood)
    Just ME and my 82 XJ 1100. Mac 4>1-2 1/2" open baffle shotgun, no octy, K&N pod filters, LED tail/brake light & directionals, 750 FD mod, Ear Cannon air horn, modified bars and dash. "Motorcyclists are all bound together by a brotherhood tie through their love of the sport, and what difference does it make what machine he rides as long as he belongs to the clan." Walter Davidson, Dec. 1920 edition of Harley-Davidson Enthusiast Magazine http://s851.photobucket.com/albums/ab78/justme1100/
  • crazy steve
    XS-XJ Guru MODERATOR
    • Jan 2009
    • 7932
    • Beautiful outer Yelm, WA

    #2
    I don't know how the XJ works in particular, but typically, these 'light monitor' circuits work by sensing load (the amount of current used by the light or lights). So installing a LED lamp reduces the current to the point the circuit thinks the light is bad.

    The fix? Well, the easy fix would be to reinstall a conventional bulb. If you're bound and determined to use the LED, try connecting a 10 ohm resistor from the power wire to the lamp to ground. Use at least a 25 watt rated resistor, and mount it someplace where it won't melt anything as it will get hot. This will mimic the load and should turn the warning light out. It will also consume just as much power as the regular bulb...
    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

    • CatatonicBug
      Master of XSology
      • Oct 2008
      • 6117
      • Clinton, UT

      #3
      There are load simulatin resistors, and they sell them next to the LED bulbs at AutoZone. However, installing them completely negates the whole purpose of using LEDs in the first place (reducing load). I'm not sure how the XJ senses those bulbs, but the only real way to continue to use LEDs and not have the idiot light tell you the bulb is dead would be to disconnect the idiot light.
      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

      Comment

      • crazy steve
        XS-XJ Guru MODERATOR
        • Jan 2009
        • 7932
        • Beautiful outer Yelm, WA

        #4
        Originally posted by CatatonicBug
        There are load simulation resistors, and they sell them next to the LED bulbs at AutoZone...
        'Bug, those won't do the job here. The 'commercial' resistors (typically 6 ohm) are designed to simulate the load of a brake/turn lamp (to 'fool' the flasher), not a taillamp. This would be too much load for a taillamp, and may toast his warning light sensor.
        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

        • justme1100
          XStremely XSive
          • Jul 2008
          • 243
          • Eagle, WI

          #5
          I fixed it, I removed the warning light bulb.
          Just ME and my 82 XJ 1100. Mac 4>1-2 1/2" open baffle shotgun, no octy, K&N pod filters, LED tail/brake light & directionals, 750 FD mod, Ear Cannon air horn, modified bars and dash. "Motorcyclists are all bound together by a brotherhood tie through their love of the sport, and what difference does it make what machine he rides as long as he belongs to the clan." Walter Davidson, Dec. 1920 edition of Harley-Davidson Enthusiast Magazine http://s851.photobucket.com/albums/ab78/justme1100/

          Comment

          • CatatonicBug
            Master of XSology
            • Oct 2008
            • 6117
            • Clinton, UT

            #6
            Originally posted by justme1100
            I fixed it, I removed the warning light bulb.
            "If at first you don't succeed, cheat!"
            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

            Comment

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