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turn signals going at rapid speed?

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Old 02-21-2008, 06:13 PM
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Default turn signals going at rapid speed?

I just reinstalled my headlights. I had the diffusers removed (naked look) so i put in new turn signal bulbs. I bought some led amber bulbs and now when i use my right or left signal the blink super fast, like three times the faster than normal. I thought that usually meant you had a bulb blown out somewhere but both the fender lights and tail lights are still working as do both leds in the headlights. When i put the 4ways on they go back to the normal speed. I dont understand, Does it have something to do with the LED bulbs? could that cause this rapid fire blinker problem?
Old 02-21-2008, 06:20 PM
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i'm pretty sure it's the LEDs.
the LEDs having more electrical resistance then normal incandecant bulbs, causes the flasher to act in the same way a blown bulb would.

but i could be wrong.
Old 02-21-2008, 06:46 PM
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pretty sure you need resisters when you run the led's
Old 02-21-2008, 06:50 PM
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Originally Posted by articbluedc5,Feb 21 2008, 07:46 PM
pretty sure you need resisters when you run the led's
i saw they had resisters built in ...what size resisters do i need to run with the bulbs (each bulb has 15 leds)
thanks for the help guys.
Old 02-21-2008, 07:05 PM
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http://modifry.com/freebies/old/blinker/index.htm

Works great /\ /\ . The Resistors you see are just to keep the LED's from frying. Your other choice is to wire a large power resistor across the LED contacts.
Old 02-21-2008, 07:30 PM
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Originally Posted by Gigdy,Feb 21 2008, 08:05 PM
http://modifry.com/freebies/old/blinker/index.htm

Works great /\ /\ . The Resistors you see are just to keep the LED's from frying. Your other choice is to wire a large power resistor across the LED contacts.
what power resistor would i need to run across the contacts? Where can i pick up resistors..radio shack or something?
Old 02-21-2008, 09:20 PM
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...but wait, turbo blinkers makes your car faster!!!
Old 02-22-2008, 05:57 AM
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Originally Posted by jeggy,Feb 21 2008, 07:20 PM
i'm pretty sure it's the LEDs.
the LEDs having more electrical resistance then normal incandecant bulbs, causes the flasher to act in the same way a blown bulb would.

but i could be wrong.
Nah the LEDs have less electrical resistance. Thermal flasher relays are dependant on the higher electrical load that the normal incandescent bulbs provide. I can't explain the details, but that's why you have to install resistors with your LED bulbs to match the load you had with your normal bulbs.

The second option you have, is to replace the thermal flasher relay with an electrical flasher relay. These types of flasher relays will flash at the normal rate regardless of how much electrical load you have.

I replaced my relay with one from SuperBrightLEDS.com (Model # CF13JL-02) but this unit was too big to fit. I had to cut up the housing to the bare minimum to have it fit, and then I wrapped it up with electrical tape.
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