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Old 4th-September-2019, 05:31 PM   #1
laser-red-nova
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LED's don't work

I bought some LED strip lights https://www.amazon.com/Partsam-Marke...07Q2QHXHC?th=1 for my front turn signals. 2 wires one hot and 1 ground.I plugged the leeds into the turn signal socket and no turn signal. I put the light accross the battery and the light works. When it is hooked up to the turn signal socket I put my yest light with one end to ground and the pointer to the ground wire of the light and it works. Why won't it work hooked to the socket with the black wire grounded. I do have an electronic turn signal flasher. Also I have LED tail lights that worked with my stock fron lights. Now they don't work with the new front LED's.

Last edited by laser-red-nova; 4th-September-2019 at 05:51 PM.
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Old 4th-September-2019, 05:51 PM   #2
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The LED's probably don't draw enough current to operate the flasher. Try putting the LED's in parallel with the original bulb. Many LED turn signal kits come with ballast resistors.
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Old 4th-September-2019, 07:26 PM   #3
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Quote:
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The LED's probably don't draw enough current to operate the flasher. Try putting the LED's in parallel with the original bulb. Many LED turn signal kits come with ballast resistors.
I don't want to run the original bulb. How would I do that?
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Old 4th-September-2019, 07:42 PM   #4
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I don't want to run the original bulb. How would I do that?
Not as a permanent solution, just a temporary connection to see if the LED'S will light. Put the bulb back in the socket and hook the LED's in parallel with alligator clips.
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Old 4th-September-2019, 08:00 PM   #5
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I'll try that tomorrow
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Old 4th-September-2019, 11:51 PM   #6
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I installed "LED Lights" on my 69 -- front & rear.

I 1st used a 'LED flasher from NAPA' # 262 . It worked -- but would flash kinda 'slow' .

I also bought some LED bulbs from "Super - Bright LED's.com" --- they were on here a few years back. Spent like - $ 80.00 - and then didn't even use them ( I used one of those LED bulbs -- for the 'Dome Light'.

But, I did change my Flasher (262) .. then, I saw the post by ; duggravs in the Electric Section (July 10, 2017).

That turn sig. flasher Works GREAT ; "AUDEW 2pin adjustable - speed Flasher" .

https://www.stevesnovasite.com/forum...698&highlight=


click on the "link" in his 1st post.

I DID BUY that 'AUDEW' flasher ---- IT Works Great just FYI

(I also added some 'WalMart LED's strip lights to my front bumper' to use as 'kinda like Day-Time-Running-Lights" -- hooked to my front park lights,

jim
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Old 5th-September-2019, 02:10 PM   #7
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What resistors would I have to buy? I hooked it up parrelel and the turn signals worked but not the LED's

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Old 5th-September-2019, 03:30 PM   #8
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Originally Posted by laser-red-nova View Post
What resistors would I have to buy? I hooked it up parrelel and the turn signals worked but not the LED's
If the filament bulb worked and you are in parallel to the wires to that bulb with wires from the LED's then either you have the polarity backwards on the LED's, a poor or missing connection, or a bad LED assembly.


I would take the LED light and put it across the terminals of the battery to make sue it works noting which wire goes to power and which to ground and then try going to the turn signal wires.

Just a head's up but on for example my 68, I have the turn signal lights and housing in the bumper and only two wires going to the light socket and one wire is for the parking light and the other for the turn signal and for things to work properly the light socket and housing MUST be grounded for things to work properly. If I were to use the two wires going to my bumper turn signal/parking light bulb and try and power up an LED strip, it would not work properly. If I had the power wire off of the LED strip to the wire for the turn signal and the ground for the LED strip connected to the parking light wire the voltage would not be right as the LED is not getting a proper ground for it to work properly.



On a side note, here are the resistors I have seen at the local parts store:

https://shop.advanceautoparts.com/p/...led%20resistor

Jim
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Old 5th-September-2019, 03:40 PM   #9
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[QUOTE=Custom Jim;5848143]If the filament bulb worked and you are in parallel to the wires to that bulb with wires from the LED's then either you have the polarity backwards on the LED's, a poor or missing connection, or a bad LED assembly.


I would take the LED light and put it across the terminals of the battery to make sue it works noting which wire goes to power and which to ground and then try going to the turn signal wires.

Just a head's up but on for example my 68, I have the turn signal lights and housing in the bumper and only two wires going to the light socket and one wire is for the parking light and the other for the turn signal and for things to work properly the light socket and housing MUST be grounded for things to work properly. If I were to use the two wires going to my bumper turn signal/parking light bulb and try and power up an LED strip, it would not work properly. If I had the power wire off of the LED strip to the wire for the turn signal and the ground for the LED strip connected to the parking light wire the voltage would not be right as the LED is not getting a proper ground for it to work properly.



On a side note, here are the resistors I have seen at the local parts store:

https://shop.advanceautoparts.com/p/...led%20resistor

Jim[/QUOTE
I hooked the LED to the battery. Worked fine. I called Sylvania about those resistors. They said they have to be used with there lights. . Your last sentence is right, so how do I ground the LED light. It's all plastic. Here is a picture of them. https://www.amazon.com/gp/product/B0...ustomerReviews
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Old 5th-September-2019, 04:40 PM   #10
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On your LED take the red wire and connect it to the turn signal wire and NOT the parking light wire.

Now on the LED, you will have a black ground wire and this needs to have a small ring terminal crimped onto the end of the wire and then drill a small hole in the radiator support, clean away any paint around the hole, then attach the ring terminal to the radiator support with a screw. If needed, extend the ground wire off of the LED light so it can reach a spot on the body that the LED light can be grounded to.

If you are not using the parking light wire off of the old socket, cap this wire off so it cannot short to ground.

The above is for one side, now do the same on the other side.

With things done this far, see if the turn signals work.

If they do not we will have to go further with things like looking at the flasher and possibly other things.

As far as the resistors only being able to be used with their lights sounds like a line to me BUT the resistors seem like a bandaid anyway. You just need the right combination of parts such as bulbs and flasher module.

Jim
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Old 5th-September-2019, 05:46 PM   #11
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Thanks for all your help Custom Jim. Update. I had the wires mixed up on the existing turn signal. I took it for granit that the black wire was ground and the other wire (only 2 wires) was the turn signal wire. ooops the other way around . So I can get the LED's working in parralel with the turn signal now. As soon as I take the 1157 bulb out of the circuit the LED stops working. Am I right then when I say all I need is the same resistor value as the 1157 bulb in line and all will be fine. If so what is the resistance of a 1157 bulb?
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Old 5th-September-2019, 06:02 PM   #12
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Quote:
Originally Posted by laser-red-nova View Post
Thanks for all your help Custom Jim. Update. I had the wires mixed up on the existing turn signal. I took it for granit that the black wire was ground and the other wire (only 2 wires) was the turn signal wire. ooops the other way around . So I can get the LED's working in parralel with the turn signal now. As soon as I take the 1157 bulb out of the circuit the LED stops working. Am I right then when I say all I need is the same resistor value as the 1157 bulb in line and all will be fine. If so what is the resistance of a 1157 bulb?
I'm glad things are getting worked out.

As far as the 1157 bulb resistance, there will be two. One for the low wattage filament (parking light) and another for the higher wattage filament (turn signal/brake light).

If you have a meter, you could check it or see what turns up in an internet search.

Just make sure the resistor is a high enough wattage. I really doubt a 1/4 watt resistors will work.

Remember just like that resistor I linked to, it has mounting tabs on it to mount it to a solid surface. Resistors will get warm to hot. Not that you will need anything super large in wattage, we have some of those style resistors at the shop I work at for load testing home and car amplifiers and some actually are meant to be placed in a water bucket to dissipate the heat. We don't need to be figuring out why your car burned down, so get the right things. This is why I'm leaning more towards a proper flasher and have it with no load resistors. BUT, that's me.

Jim
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Old 5th-September-2019, 06:07 PM   #13
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Yep, talking about taking things for granted, I have my truck at a repair shop for a third time hoping this time they have the timing marks lined up. He told me the first time it was right but it was not and then they looked at it a second time and said it was off a few teeth and the third time I found out they had the diamond mark line up with a triangle when it is to be a diamond lined up to a diamond. I would have thought the shop would have gotten it right and two of the mechanics looked at the marks and said it was right when it was not and I was starting to think the truck had other issues. They took for granted the timing marks were all the same but in this motor they are not.

Jim
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Old 5th-September-2019, 06:14 PM   #14
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I did a little research. See if you agree. I found out that a 1157 bulb on the bright side was 27 watts and 2 amps. According to Ohms law I would need a 7 ohm resistor to mimic that bulb at 14 volts. Now to find 2, One for each side, 7 ohm resistors. Radio shack does not exist anymore. I didn't come up with those numbers by my self. GOOGLE did. I will update when I get parts. Thanks
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Old 6th-September-2019, 12:39 AM   #15
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I did a little research. See if you agree. I found out that a 1157 bulb on the bright side was 27 watts and 2 amps. According to Ohms law I would need a 7 ohm resistor to mimic that bulb at 14 volts. Now to find 2, One for each side, 7 ohm resistors. Radio shack does not exist anymore. I didn't come up with those numbers by my self. GOOGLE did. I will update when I get parts. Thanks
If I remember right what I saw was the resistors that Sylvania said would only work with their lights were 6 ohms ?.

I looked at the link I had in another post and the picture of the package shows 2 load resistors, 12V, and 6 ohms.

I guess maybe when you called Sylvania they think their 6 ohm resistors are "special" and only work with their bulbs ?. I think you got the newbie guy.

Jim
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