'77 Yamaha XT500 turn signal trouble

Discussion in 'Motorbike Technical Discussion' started by philb, Sep 11, 2003.

  1. philb

    philb Guest

    I just purchased a nice '77 XT 500 original except the turn signals
    were stripped off. I bought aftermarket signals(6v)) specifically for
    this model. After plugging into the existing harness, the front
    signals light up fine, but will not flash. The rear signals are dim
    and also will not flash.
    Is this a ground problem or possibly the relay is bad? Or maybe the
    rear bulbs are different wattage?
    A new relay is $70.+...
    philb, Sep 11, 2003
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  2. philb

    motownmoto Guest

    philb ......

    You've got power to 'em, so you have a 'ground' problem.


    '95 750 Nighthawk (big red)
    '95 Helix (little red)
    '93 Ninja (up 'n runnin')
    motownmoto, Sep 11, 2003
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  3. A car relay which does the same job is a tenth of this.

    Or is the XT500 six-volt? In which case a moped relay - probably even
    The Older Gentleman, Sep 11, 2003
  4. philb

    philb Guest

    Thank you everyone for the response. I am posting via Google so it
    takes a while.
    I am leaning towards the "ground' also.
    Good ideas for the relay. (6volt) If it comes to that I will
    definitely benefit.
    Something struck me today... the taillight bulb is missing , I ordered
    a new bulb but it hasn't arrived yet. Would the missing connection
    thru my taillight cause the system to be ungrounded(tech term)?

    philb, Sep 12, 2003
  5. No
    The Older Gentleman, Sep 12, 2003
  6. philb

    philb Guest

    I looked at the bulbs today, the rear is a 2 element bulb and the
    front is a single. No swapping.
    I grounded the rear signals directly to the main ground at the
    battery. No different.
    It is interesting though, I started the bike, and turned the left
    signal on. Front is bright as day, rear on, but dim. Did the same for
    the right.
    I revved the motor to clear it out, and lo and behold! the blinker
    opposite side works too. If I keep the motor revved at 5,000 rpm, they
    will flash consistently. When I let off, they stop flashing. The rear
    signal stays dim though...
    philb, Sep 13, 2003
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