Blinker wiring question - how to get blinkers to stay ON and flashOFF?

Discussion in 'Motorbike Technical Discussion' started by Masospaghetti, Jul 6, 2005.

  1. Trying to rig up my own system on a enduro bike the previous owner
    stripped out.

    Right now, the turn signals stay off until the blinker is activated, so
    it blinks on. How can I wire it so it stays on, and blinks off?

    I know its possible to some extent because some cars do this - the new
    Pontiac Grand Prix comes to mind.

    Help is appreciated! Thanks!
    Masospaghetti, Jul 6, 2005
    1. Advertisements

  2. Masospaghetti

    NA Guest

    Masospaghetti wrote:

    Isn't this the way it's supposed to work? This is how my
    turn signals operate on my bike.
    I'm sure it can be done but wouldn't this put additional
    load and drain on your power system?

    NA, Jul 6, 2005
    1. Advertisements

  3. You want running lights and turn signals in one lamp housing...

    You could find some dual filament bulbs and sockets to replace the
    single filament bilbs and sockets. Whatever the rear brake light bulb
    is, you want that bulb and socket. It's probably an 1157 bulb if you
    have a 12-volt system. You would wire the lower wattage filament to
    come on when your headlights are on, the higher wattage filament comes
    on when you turn on the headlight...

    It might be simpler just to go to and look at
    aftermarket replacement front turn signals for motorcycles that have
    running lights...

    If you have a 6-volt system instead of a 12-volt system you'd want
    dual filament bulbs...
    krusty kritter, Jul 6, 2005
  4. Thats actually how I have it wired now - with dual-filament 6 volt
    bulbs, where the lower power filament stays on and the higher one blinks.

    However, I'm going to fabricate LED bulbs to replace the filament bulbs
    because the bike I'm working with generates so little electricity. With
    the LEDs, I figured it would be more efficient and logical to go ahead
    and have them at full brightness all the time, because they take so
    little power.
    Masospaghetti, Jul 7, 2005
  5. In that case, I think you'll have to ditch the thermo-mechanical
    turn-signal relay and go with a purely (digital[1]) electronic solution;
    LED signals almost surely won't draw enough current to activate the
    bimetallic switch in the relay. If you can't find an off-the-shelf
    solution, any hobbyist familiar with TTL/CMOS SSI ICs and switching
    transistors should be able to cobble one up[2].

    [1] OK, you need an oscillator, so you could do it analogue, but it's
    probably easier to adjust if you use a higher frequency and scale it down.
    The combinatorial logic may be easier with digital, too[3].
    [2] Sorry, I'm up to my all in assigators at the moment...
    [3] Hmm, maybe not, but see [2].

    Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration,
    Brunel University. Ivan.Reid@[|] Room 40-1-B12, CERN
    GSX600F, RG250WD, DT175MX "You Porsche. Me pass!" DoD #484 JKLO# 003, 005
    WP7# 3000 LC Unit #2368 (tinlc) UKMC#00009 BOTAFOT#16 UKRMMA#7 (Hon)
    KotPT -- "for stupidity above and beyond the call of duty".
    Dr Ivan D. Reid, Jul 8, 2005
  6. Thanx for responses!

    My plan was to leave the rear incandescent bulbs in and replace the
    front bulbs with LEDs - I think the current flasher relay will work with
    only one incandescent bulb on each side.

    Gah, I would need ICs and stuff? I was hoping it was just a clever way
    of wiring it :(
    Masospaghetti, Jul 9, 2005
  7. Masospaghetti

    Dave HD Guest

    Nope I don't think it will work with only one incandescent on each side, the
    blinker would only see the current from that one bulb and act as if it had a
    burned out bulb in the circuit and not flash but stay on. You need the
    combined draw from both bulbs to activate the flasher.

    Dave HD, Jul 9, 2005
  8. Masospaghetti

    John Johnson Guest

    There's been one or two plans for this sort of thing posted to the group
    in the past, so it's probably worth scouring the archives as well as web
    sites for info.. I know that I copied off plans for an LED brake light
    conversion at one point, anyway.

    You might also check around to see what bikes use purely electrical
    blinker relays, as I recall reading about some that do so (typically
    here, people bitching about the expense and asking whether they can be
    replaced with automotive-style bimetallic relays). fwiw, anyway.


    'indiana' is a 'nolnn' and 'hoosier' is a 'solkk'. Indiana doesn't solkk.
    John Johnson, Jul 9, 2005
  9. Masospaghetti

    Bownse Guest

    You can resolve the flasher load issue if you install a resistor in each
    circuit (near the signal bulb on either the front or back, but not
    both). The problem with this solution is that you then have the same
    load on your system that you did with standard bulbs. You lose on the
    main reasons for going to LED in the first place (saving watts for
    something else).
    Bownse, Jul 9, 2005
    1. Advertisements

Ask a Question

Want to reply to this thread or ask your own question?

You'll need to choose a username for the site, which only take a couple of moments (here). After that, you can post your question and our members will help you out.