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Old 10-10-2011
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LED Flasher Problems

I have updated all bulbs with LED bulbs. I have upgraded to the EP27 relay and my rear brake/flashers work great but my front amber turn signals do not.

when the bulbs are installed and I turn on the signal it causes both front turns and both front side markers flash all at the same time. I DO NOT have the side marker turn signal mod.

any ideas on why this would be happening?

I have all SMD LED's except for my third brake light BTW.
here are the bulbs I have
http://www.ebay.ca/itm/2x-3157-3057-...#ht_3235wt_952
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Old 10-10-2011
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Originally Posted by Shady_User View Post
I have updated all bulbs with LED bulbs. I have upgraded to the EP27 relay and my rear brake/flashers work great but my front amber turn signals do not.

when the bulbs are installed and I turn on the signal it causes both front turns and both front side markers flash all at the same time. I DO NOT have the side marker turn signal mod.

any ideas on why this would be happening?

I have all SMD LED's except for my third brake light BTW.
here are the bulbs I have
http://www.ebay.ca/itm/2x-3157-3057-...#ht_3235wt_952
Normally current flows through the running lights circuit, but you don't see it because it's not enough current to make the filaments glow, and light up.

When I had this problem in my 2004 I put a bulb in parallel with the rest of the running light system so that it had something to light up instead of the LEDs. This has been working fine for a few years. It would be more elegant to do the same but with a large wattage resistor somewhere where heat will not be a problem.
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Old 10-10-2011
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Thanks JP. would you recommend putting one resistor per bulb or one in parallel with the entire circuit? and what size resistor would work? I am guessing one that would mimic the resistance of my stock bulb?
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Old 10-10-2011
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V-LEDs sells resistors, among other places. You get them based on how many turn signal bulbs you have replaced with LEDs.

Here: http://www.v-leds.com/BlinkerWarning...orLanding/true
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Old 10-10-2011
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V-LEDs sells resistors, among other places. You get them based on how many turn signal bulbs you have replaced with LEDs.

Here: http://www.v-leds.com/BlinkerWarning...orLanding/true
He does not need them for his turn signal circuit. It is for his running lights circuit.

I used different size bulbs until I saw the one with the least current draw that would still not turn the diodes on.
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Old 10-10-2011
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He does not need them for his turn signal circuit. It is for his running lights circuit.

I used different size bulbs until I saw the one with the least current draw that would still not turn the diodes on.
Must have missed that as I just skimmed the original post, but will those resistors not still work?
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Old 10-10-2011
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Must have missed that as I just skimmed the original post, but will those resistors not still work?
It's overkill. He won't need to draw that much current.
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Old 10-18-2011
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JP7 can you recommend a bulb that will solve this problem? Do I have to find a running light bulb with enough resistance that it isn't lit up when my turn signals are on, correct?
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Old 10-18-2011
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JP7 can you recommend a bulb that will solve this problem? Do I have to find a running light bulb with enough resistance that it isn't lit up when my turn signals are on, correct?
I would try a 6 ohm resistor in parallel, if that works, try something higher. Keep going higher until it does not work anymore.

Keep in mind you need a resistor that will handle the power dissipation (yes it will get HOT)
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Old 10-19-2011
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The place I linked has 6 and 25 ohm resistors.
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Old 10-19-2011
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I'm thinking a 5 - 10 ohm resistor should be ok... but won't it need to be a rather large wattage (seeing as how most small led circuits we play with use 1/4w resistors), like maybe 5w?

It would be almost the same amount of work to install a bulb socket & a small t10 base bulb & hide it somewhere out of the way.

Just a thought.
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Old 10-19-2011
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I'm thinking a 5 - 10 ohm resistor should be ok... but won't it need to be a rather large wattage (seeing as how most small led circuits we play with use 1/4w resistors), like maybe 5w?

It would be almost the same amount of work to install a bulb socket & a small t10 base bulb & hide it somewhere out of the way.

Just a thought.
Much more wattage, at 14V, a 6 ohm resistor dissipates 32.6w.

I would go close to 50w.

This is why you want to use as high a resistance as possible where you can go as high as you can and things don't act up. Higher resistance lowers the current draw, and power dissipation.
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Old 10-19-2011
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Ouch, that's gonna be one heck of a resistor.
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Old 10-19-2011
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Ouch, that's gonna be one heck of a resistor.
I know, that's why its a good idea to experiment and really make sure you have the highest resistance you can where things still function correctly.
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