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Old 01-21-2013, 10:54 AM   #1 (permalink)
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Default Load Resistor Question

I'm sure this question has been asked and answered a gazillion times, but please indulge me. I have installed LED turn signals without a load resistor. And I off course am experiencing the rapid flashing. I ordered a set of load resistors (6 ohm 50 watts) to take care of this little problem. Below is a schematic drawing I did showing the load resistor and the LED. The resistor is supposed to be parallel to the diode. Is what depicted in the drawing accurate? Thanks again!

Load Resistor Schematic.jpg
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Old 01-21-2013, 11:53 AM   #2 (permalink)
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Looks correct to me.

The hyperflashing is because the car thinks a bulb is blown based upon the fact that the current is less than designed (the LED uses very low current compared to an incandescent bulb). Adding the resister in parallel allows more current to pass through the control module, thereby "fooling" the computer into thinking that incandescent bulbs are installed and functional.
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Old 01-21-2013, 07:49 PM   #3 (permalink)
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Quote:
Originally Posted by jglopic View Post
Looks correct to me.

The hyperflashing is because the car thinks a bulb is blown based upon the fact that the current is less than designed (the LED uses very low current compared to an incandescent bulb). Adding the resister in parallel allows more current to pass through the control module, thereby "fooling" the computer into thinking that incandescent bulbs are installed and functional.
Thanks so much for the input. I appreciate it.
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Old 02-07-2013, 12:18 PM   #4 (permalink)
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Check superbrightleds.com, they have relays to replace OEM which they say fix the hyper-blink effect. I've never used them, just going off their advertising.

2011 Hyundai Sonata Installation Accessories LED Replacement Bulbs | LED Lights for Cars | 12v | Super Bright LEDs
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Old 02-07-2013, 12:56 PM   #5 (permalink)
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Thanks for the reply everyone... installed and working great. I'm happy happy happy!
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Old 02-07-2013, 01:29 PM   #6 (permalink)
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Quote:
Originally Posted by Thatguy_JZ View Post
Check superbrightleds.com, they have relays to replace OEM which they say fix the hyper-blink effect. I've never used them, just going off their advertising.

2011 Hyundai Sonata Installation Accessories LED Replacement Bulbs | LED Lights for Cars | 12v | Super Bright LEDs
Sonata's don't have an external flasher relay like this. Hyundai programs the flashing function into the BCM and uses the hyper-flash simply to alert the driver that a bulb is out. The hyper-flash function cannot be overriden in this type of design except by load resistors which make the car "think" that an incandescent bulb is installed.
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Old 02-07-2013, 01:44 PM   #7 (permalink)
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Good to know, thanks!
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