Author Topic: Turn signal buzzing  (Read 5533 times)

Offline Andrewck

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Turn signal buzzing
« on: April 19, 2015, 09:49:01 AM »
I replaced the headlight of my bike with a new incandescent light and replaced the front turn signals with LED bulbs. The bike has functioned normally for about a year now since doing the conversion. The other week, I purchased an LED taillight/license plate/turn signal combo for the rear. I hooked all the wiring up and when I turn the bike on, I get a buzzing/whining noise while it's running. If I unplug the turn signals and leave the taillight hooked up with the incandescent rear signals, there is no problem.

What is going on with my bike? I assume the starter relay is fine as the problem only occurs when all electronics are hooked up to LED. Do I just need load resistors for the rear flashers? Do I need load resistors for everything that uses an LED bulb? :mbird
1990 K75S

Offline Scott_

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Re: Turn signal buzzing
« Reply #1 on: April 19, 2015, 10:47:53 AM »
I would say you have 2 options...
Load resistors for the turn signals, or modify your turn signal module(located in the relay box).
In this thread here:
http://www.motobrick.com/index.php/topic,659.0.html
you can build your own as Duck did or you can modify your existing one as per Inge's suggestion in the last post.
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Offline Andrewck

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Re: Turn signal buzzing
« Reply #2 on: April 19, 2015, 01:28:43 PM »
OK, so Inge K. states to cut next to the red dot.  My flasher relay board does not look like his.  Any idea what I cut??
1990 K75S

Offline Inge K.

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Re: Turn signal buzzing
« Reply #3 on: April 19, 2015, 04:22:55 PM »
Another red dot.
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Offline Andrewck

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  • Posts: 95
Re: Turn signal buzzing
« Reply #4 on: April 19, 2015, 07:43:24 PM »
I posted this on a couple of threads, but it worked perfectly.  All LED signals are blinking like OEM...though a lot brighter.  Brilliant!
1990 K75S

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