2003 Thunderbird 900 - Headlight Fuse Keeps Blowing

Discussion in 'Technical Help' started by Robert Leigh, Aug 23, 2019.

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  1. Robert Leigh

    Robert Leigh New Member

    Jun 18, 2018
    16
    3
    Newmarket, Suffolk, UK
    Hi All,
    I'd appreciate some help, please.
    I have an annoying issue that looks like its going to ruin a sunny bank holiday :sob:
    I was riding a couple of nights ago and went on reserve. It coughed and shuddered, put it on reserve and it picked up perfectly again. But when I looked up, the headlight had gone out, high and low beam (laos neutral and side stand cut-out). I limped home in the dark and checked at home and it was a blown fuse.
    I changed it today and all was good for a mile then it went again.
    I suspected maybe a faulty headlight relay - but I don't think it has one?
    I thought maybe a chaffed live wire grounding, but the blown fuse is only just broken - no burning so maybe a slow blow rather than a direct short to ground?
    Any ideas of what to look at would be welcomed.
    Thank you
     
  2. Sprinter

    Sprinter Kinigit

    Aug 17, 2014
    6,026
    1,000
    uk
    Could've a Broken insulation cover, only fusing when turning the steering?
     
    • Like Like x 1
  3. Robert Leigh

    Robert Leigh New Member

    Jun 18, 2018
    16
    3
    Newmarket, Suffolk, UK
    Thank you - i’ve Got the tank, seat and all panels off - I’ll check all the wires for damaged insulation . Thank you for your suggestion I’ll definitely check that. Thank you
     
  4. Robert Leigh

    Robert Leigh New Member

    Jun 18, 2018
    16
    3
    Newmarket, Suffolk, UK
    Well I think you were right.
    Inside the headlight shell there were a load of wires held with metal "tags" welded to the shell.
    The insulation on a few wires was damaged, although I could see through to the conductor.
    I taped up and added additional sleeving and after 50 miles it appears to have gone away.
    fingers crossed.
    cheers
     
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    • Thanks Thanks x 1
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