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Author Topic: LED tailights not working?  (Read 2157 times)
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juicestain09
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« on: October 29, 2011, 11:30:55 AM »

I put red LEDs in my tailights and they are not working... Is there something extra I'm supposed to put in? Do I need a resistor or relay of some sort? I know I need a resistor for the front turn signal LEDs that I'm putting in, but I didn't think I needed anything for the tailights. I put some LEDs in the reverse lights as well and they work great. What am I missing?
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Richard Baker
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« Reply #1 on: October 29, 2011, 11:37:01 AM »

This is a poser- I just swapped mine directly and they worked the first time. I do not have any resisters int he circuit either- I like the hyoer-flash as my LEDs flash at full brightness 5 times during a standard blink- handy when changing lanes on the interstate. Double check that you have the right kind of bulbs- they should be type 1157 (dual conatct), not 1156 (single) since they act as running lights and turn signals too.
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juicestain09
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« Reply #2 on: October 29, 2011, 12:58:10 PM »

Ended up just having the stupid things in backwards. I looked at every angle, the damn things are exactly the same on both sides. But they're working now. LEDs in front turn lights, tail lights, and reverse lights. Looks great! Only issue now is the hyper flash. I got the resistors to get rid of it, I just don't know where I'm supposed to put them in... Anyone know?
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Richard Baker
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« Reply #3 on: October 29, 2011, 02:19:26 PM »

The resisters go in line with the wire running the turn signal. I forget the color, but you can use the straight-pin and metter emthod to see which one is getting the current. clip it and attach the resistor in between the two halves.
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juicestain09
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« Reply #4 on: October 30, 2011, 07:02:18 AM »

Ok sounds easy enough. Didn't know I'd need 1 resistor for each light though... Gonna need to get 2 more. I'm assuming I can get just any 60 W, 5 Ohm (I think) resistor? Then to figure out why my one low beam wouldn't come back on after I unplugged it, put it in a new headlight assembly, then plugged it back in. Seems to be power going to the ballast but not coming from it. For those 2 single wire harnesses from an HID ballast, 1 is a power and 1 is a ground right? If so, I'm not getting any power from the ballast. I'm gonna try swapping in a new ballast I had for my fog lights to see of it works. Don't understand what would've F-ed the ballast though... All I did was unplug the bulb to put it in a new headlight assembly. Anyways, my lighting project is not done yet!
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juicestain09
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« Reply #5 on: October 30, 2011, 10:40:46 PM »

I forgot that the harness going into the ballast had to be put on red wire to negative and black wire to positive... works fine. Glad it wasn't anything bigger. Now I just need the 2 more resistors for my turn signal LEDs, and I need to dremel off the bolts that hold the fog lights in place. I attempted taking them out and it became harder and harder to get the nut off the back until eventually the head of the bolt just came off of the metal behind the actual fog light assembly... Pain in the ass. My fog lights are all chipped up and look pretty bad, so I got some new ones to put in and I can't wait! Putting some 5000k HIDs in them, which should finish my lighting project.
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