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custom taillights, 3157 bulb

Printed From: the12volt.com
Forum Name: General Discussion
Forum Discription: General Mobile Electronics Questions and Answers
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=75639
Printed Date: May 01, 2024 at 10:31 PM


Topic: custom taillights, 3157 bulb

Posted By: jwagg
Subject: custom taillights, 3157 bulb
Date Posted: April 03, 2006 at 8:38 PM

Ive been making some custom taillights for my car for about a month, ive finally come down to wiring them, basically it deals with taking the turn signal function out of a dual filiment bulb. Usually, in this case, i would have used another 3157 size bulb in its place as the turn signal, but in this install im using a 194 bulb.

Im getting a fast flash, indicating that the bulb is burnt out, but it isnt. Im thinking its because the bulb isnt creating enough resistance in the circuit and its triping a sensor.

I measured the resistance across the 3157 bulb, its roughly 30 ohms. I measured the resistance across the 194 bulb, its roughly 6 ohms. Am I correct in thinking that if i buy a 24 ohm resistor, and place it across the 194 bulb wires, that it will create as much resistance as a 3157 bulb?

Will the bulb even light with the resistor on it? Any help would be great. Im not farmiliar with resistance, and im not sure if you can just add it up like that.



Replies:

Posted By: Big Dog
Date Posted: April 03, 2006 at 8:45 PM
You answered all your own questions! Congrats! Now find ceramic resistors which can carry that much current.

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Prepare your future. It wasn't the lack of stones that killed the stone age.




Posted By: jwagg
Date Posted: April 03, 2006 at 9:09 PM
okay, so what kinda resistor do i need? a 24ohm 12 volt?




Posted By: geepherder
Date Posted: April 03, 2006 at 9:30 PM
Use a heavy duty flasher- it should say it's not load sensing.  Using resistors would be counterproductive, because they'd eat up most of the wattage- your bulbs would only get a couple of volts or so (they'd be too dim).

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My ex once told me I have a perfect face for radio.




Posted By: jwagg
Date Posted: April 03, 2006 at 9:39 PM
what is a heavy duty flasher, where can i get one?




Posted By: geepherder
Date Posted: April 04, 2006 at 6:02 AM
Its a flasher that won't change speed when a bulb goes out.  They're used on big trucks and you can get one at your local parts store.

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My ex once told me I have a perfect face for radio.




Posted By: jwagg
Date Posted: April 04, 2006 at 9:15 AM
is it a new socket? or is it a new bulb? I need to use s 194 bulb.




Posted By: jwagg
Date Posted: April 04, 2006 at 10:19 AM
okay, i went to advanced auto parts, and they carry them, but they still indicate bulb outage by blinking twice the normal rate........... I have an 02 cavalier. Any sugguestions?




Posted By: geepherder
Date Posted: April 04, 2006 at 6:42 PM
Then you got the wrong thing.

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My ex once told me I have a perfect face for radio.




Posted By: jwagg
Date Posted: April 04, 2006 at 10:22 PM
i didnt buy it. It says heavy duty flasher. I believe model number ep27. its a square one. I was ready to buy it, but on the package it says "heavy duty flasher" indicates bulb outage by flashing at twice the normal rate.




Posted By: geepherder
Date Posted: April 05, 2006 at 6:12 AM
You want the one that says it doesn't flash faster when a bulb goes out.

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My ex once told me I have a perfect face for radio.




Posted By: jwagg
Date Posted: April 05, 2006 at 9:26 AM

I cant find one, they all blink twice the rate, im trying this mod found here, although its for a jeep, they are very similar, i believe each uses the ep27 replacement. Any more advice?

https://www.stu-offroad.com/electrical/led1/led-4.htm





Posted By: geepherder
Date Posted: April 05, 2006 at 8:12 PM

Check this link: https://www.cartestsoftware.com/fz1/tridonep37installation.html.



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My ex once told me I have a perfect face for radio.





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