I want to put resistors on my taillights so I can put some LED bulbs in. Which wire do I splice into to put the resistors onto? The yellow, brown, or black? thanks.



bump for some help

 

Well the resistor goes on the +ve terminal of the LED. And usually the black is neg. so I would go with the yellow. And you only need a resistor if the LED bulbs aren't 12V. What voltage and amperage are they? You need those to calculate the required resistor.

 

test it with multimeter

 

I thought the LED taillight bulbs have less resistance thus causing the car to think the bulb is out.

I had a pair of them on my balt a little bit ago, but it went blink crazy so I returned them and thought I would try again later. So ya.

I am not sure what voltage they were, but I assume by what your saying it wasnt 12v.

 

no hes saying you were to vague with your question so no one knows what ur talkign about. EIther way to add the flasher resistor to make you 3157 led bulbs flash normally you splice the power wire. Its probably the yellow but you should test each wire with a multimeter

 

i can tell u for sure on just about all gm cars the black is ground and the brown is parking light. so i can only assume that the yellow is the stop lamps. w/out looking at the wiring schematic
use a test light and test them w/ the blinker on when the test light blinks u know thats the one to put the resistor on

 

Thanks a lot guys. Sorry for being vague.

 

You weren't really being all that vague. Any LED bulb designed for use in vehicles is natively 12V. The blinker problem arises from what you said, less resistance, so it makes the car think a bulb is out. The wire you want to use is the yellow wire, like dsp86 said, the black is ground and the brown is the parking lights. What you want to do is splice one end of the resistor into the yellow wire and one into the black wire. That'll provide the extra resistance to stop the blinkers from going nuts. I don't really recommend just using any old resistor for this though, as they WILL get hot and may cause damage to their surrounding area. I'd recommend you get resistors that are actually made for this purpose, as they are encased and are better suited for the job. You can find some here, as well as any other type of LED bulb you could possibly imagine: http://www.v-leds.com/Shop/Control/P...id/0/SFV/32481

 

man i remembered ur name and thought u may be able to answer a question about the parking/blinker lights up front... any idea how to get use a 12v constant and a 12v flasher to actually blink without wiring a relay to turn use the 12v flasher to cut the power (if that makes sense)

 

I actually do have some resistors designed for this. They are 3 OHM. and thanks for the advice. I dont just line in the resistors on the yellow wire? that wont work? Cause that be a lot easier, that way I just cut the wire and crimp the resistor on it.

 

i would think you run it inline with the pos. lol look at the star led i have in my projectors. It has 5 or 6 resistors inline on the pos but nothing on the neg

 

So that should work then. thats what I was thinking, just wanted to make sure.

 

thats how ive always done it. i dont know about the flasher resistor thing but i dont see how or why you would want to hook both pos and ground together

 

wouldn't that actually make the circuit miss the resistor all together? and do nothing? cause electricity uses the past of least resistance... Glad were on the same page. If there is something were missing please help. Thanks

 

not really. electroniclly you never want to touch power and ground assuming the power is hot. Series wiring is a completely different matter and is acceptable but i dont know if thats how u should be doing it

 

Understandable. It makes since to me. Thats how I was thinking of wiring it, Just wanted to make sure that was right. And find out which wire to put it on.

 

Sorry man, I'm not familiar with what you're trying to do.

As for just splicing the resistor into the yellow wire, I would suspect it may or may not work, but it goes against how I wired up my load resistors for my front signals. The instructions for the resistors I use specifically tell you to connect one end to the positive and one to the ground. You can see for yourself here: http://www.v-leds.com/Shop/Control/P...id/0/SFV/32481 look for the picture that shows the wiring. Putting the resistor inline with the positive wire would probably just lower the voltage going to your lights and cause them to be dimmer.