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LED turnsignal won't flash

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  #1  
Old 05-09-2008 | 10:45 PM
andrewsi's Avatar
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Default LED turnsignal won't flash

I replaced my turnsignals on my '02 F4i about six months-year ago with flushmount LED turnsignals. I was given them by a friend who never used them, so I installed them myself. I know nothing about them other than they are LEDs. No info. on if they have built in resistors or even Candella rating.

They are wired correctly, but I never considered resistors at the time I wired them. I didn't see how resistors would affect them other than making them blink faster than normal. They operate properly as running lights, but when I hit the blinker switch, the activated blinker just turns off instead of blinking. I have read from a few people that have installed LEDs that if they blink too fast or burn out that they need a resistor in series. My LED turnsignals have not burnt out or harmed my battery, but they do not flash at all when activated.

Is the blinker's electricalcircuit in need of a resistor? If so, how many Ohms? Where should I put it in the circuit?
Also, Can anyone explain the difference between Ohm rated resistors and Watt rated resistors?

I am a mechanical engineering senior at UF and have taken a circuits class, but I am a mechanical engineer not electrical for a reason. But, don't be afraid to be very technical.

Cheers,
AJ
 
  #2  
Old 05-09-2008 | 11:37 PM
andrewsi's Avatar
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Default RE: LED turnsignal won't flash

If you guys think it is a missing resistor, why do LEDs need resistors to blink, but work OK as running lights? I understand why they might need the resistor so that they don't burn out. Why do they need it to blink?
 
  #3  
Old 05-09-2008 | 11:42 PM
redzintimidator's Avatar
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From: Greene, NY
Default RE: LED turnsignal won't flash

LED's need resistors in parallel to blink because they draw very little current. The blinker relay is a current driven device.Therefore, no current=no blinky.

Instructiones: http://cbrworld.net/forums/thread/141166.aspx

You are just on the extreme end of the fast blink i think. it happens. this should fix it.
 
  #4  
Old 05-10-2008 | 11:23 AM
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  #5  
Old 05-12-2008 | 10:43 PM
andrewsi's Avatar
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Default RE: LED turnsignal won't flash

Thanks for the help. I'll check the website suggestions out. CBR forum always helps
 
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