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Thread: Question for the electrical knowledgable - RT

  1. #11
    STOC #687 dwalby's Avatar
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    Re: Question for the electrical knowledgable - RT

    Quote Originally Posted by T_C View Post
    To efficiently dim them it's easier to do PWM (Pulse width modulation).

    Doing the PWM at a relatively high frequency and the the smoothing function in most multi-meters will interpret it as a reduced voltage.

    If you have a frequency counter on your meter, try that setting and see what you get at the lights when in marker light mode. Or... try setting your meter to A/C and measure.
    Yeah, that's what I was wondering with my reduced duty cycle comment earlier. Dunno if the same dimming method could be used for incandescent bulbs as well. A scope would be best to see exactly what's going on with the voltage supplied by the Canbus because if it is some low duty cycle PWM then using the diodes probably won't help much. With your multimeter in AC mode you just have to make sure its measuring voltage from the pulses and not just some small ripple voltage that its picking up off the DC circuit in general. I think with the alternator running there's always some small AC component on the DC anyway, but I've never measured it to be sure. Not home right now or I'd go out to the garage and measure the AC component on my battery to see what level to expect for that.

  2. #12
    Ventura Highway wjbertrand's Avatar
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    Re: Question for the electrical knowledgable - RT

    Maybe this will work?

    https://www.clearwaterlights.com/pages/canopener


    Sent from my iPhone using Tapatalk Pro

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    Re: Question for the electrical knowledgable - RT

    Quote Originally Posted by mlheck View Post
    Is there a top box plug available? This may have a dedicated brake light wire for a top box brake light. This is what I used to run the Whelen on my K1600.

    Sent using Tapatalk
    The Hexheads use incandescent taillights and they never offered an LED light top box like the 1600s have. So, no, that is not an option on 2005-2013 RTs.


    Dave

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    Site Supporter vinny's Avatar
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    Re: Question for the electrical knowledgable - RT

    Have you tried a zener diode? Find one that has about a 10v breakdown threshold and use that.
    I am not young enough to know everything!

    You don't have to have the last word to win the argument!



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  7. #15
    STOC #687 dwalby's Avatar
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    Re: Question for the electrical knowledgable - RT

    I like Vinny's idea about the Zener diode.

    Also, regarding using your multimeter in AC mode, I measured the AC component on my battery and it was in the 60-70mV range with the bike idling. The reason I mentioned this before is you'll probably want to calibrate your voltage drops with the bike running, since that's the voltage the brake circuit will be seeing in normal operation with the alternator charging.

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