LED tail lights
Printed From: the12volt.com
Forum Name: Lights, Neon, LEDs, HIDs
Forum Discription: Under Car Lighting, Strobe Lights, Fog Lights, Headlights, HIDs, DRL, Tail Lights, Brake Lights, Dashboard Lights, WigWag, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=15850
Printed Date: May 28, 2024 at 10:50 PM
Topic: LED tail lights
Posted By: BD pathfinder
Subject: LED tail lights
Date Posted: July 03, 2003 at 10:15 PM
I am installing a new tail light in my truck.. There was no trouble in hooking up all the correct wiring. back up-stop-tail-turn. however when I turn on the turn signal they blink real fast as if there was a bulb out. Now I know the signals use resistance to determine the blink speed intervals. I have tried using a 2k resistor and they still blink fast just dimmer.. what am I doing wrong?
Replies:
Posted By: bigunner1
Date Posted: July 04, 2003 at 12:38 PM
i think the leds might not have enough resistance. i tried those led 1157 bulbs on my truck, and it did the same thing. i have a 1992 chev truck, and as you know the brake and signal light use the same bulb, but at the time i had a ZR1 rollpan, and this had 2 bulbs per side, when i put the led bulbs in, the signals would flash fast, and believe it or not, my astrostrart would not start my truck. the error code i was getting on the remote start said "brakes applied". the second i took out the leds,,,it started as soon as i hit the remote. now i also tried a heavy duty flasher, but it didn't work for the starting problem, and i can't remember if it helped with the fast flashing, but it is worth a try. these are usually used when you have a trailer with all the lights.
Posted By: xetmes
Date Posted: July 04, 2003 at 1:11 PM
you could replace the thermal flasher with an electronic one, i think that will fix it without having to disapate power in a resistor
Posted By: hotrodelectric
Date Posted: July 06, 2003 at 6:07 PM
www.lambertenterprises.com
The link sends you to a site that makes LED systems for rods. They also make a load box (basically 2 sand block resistors on a board in parallel to ground) which will give the proper load to your flasher. Easy hookup- the two green wires go to the front turn lamps (one to each) and the black wire to ground. If I can find the open one I have, I'll look up the values so you can just go get the resistors yourself.
Posted By: chevylove
Date Posted: July 08, 2003 at 1:43 AM
Your problem here is that the leds aren't creating enough resistance. One of the selling points for leds is that they use so much less power than a standard bulb.Your car probably senses less than half the resistance that it's designed for, thus the "bulb out" flashing. ------------- Drew "Fuses are only 10 cents...go for it."
Posted By: BD pathfinder
Date Posted: July 08, 2003 at 4:47 PM
OK. I figured it out. thanks for all the help.. It looks like there was a special lights out safty curcuit built into the electrical system. I tryed using resistors of all sizes. But that didnt help..I ended up removeing the curcit and adding in a new old fashoned flasher to the system... problem fixed. slow flash.
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