LED Brake Lights WITHOUT Resisitor - JKowners.com : Jeep Wrangler JK Forum
 
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post #1 of 8 Old 07-09-2014, 01:29 PM Thread Starter
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LED Brake Lights WITHOUT Resisitor

I am going to be installing a set of the Rockridge LED brake lights and have a question about the resistors.

I actually don't mind the fast blink and would prefer it over the hot resistor but will it trigger the bulb out indicator in the dash if I don't install the resistor. I didn't even know it had the warning but one of the tail lights went out once and it sure enough told me on the dash.

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post #2 of 8 Old 07-09-2014, 06:48 PM
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I have had a resistor fail on me and cause a fast blink but never had an idiot light come on from it.

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post #3 of 8 Old 07-10-2014, 07:24 AM
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I'm running LEDs in the rear w/o resistors and don't have any bulb out indicator on the dash. Just fast flashing turn signals. BTW, mine's a 2012.
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post #4 of 8 Old 07-11-2014, 07:32 AM Thread Starter
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Thanks, guys. Mine's a '12 also.
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post #5 of 8 Old 07-21-2014, 12:24 PM Thread Starter
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Well, pulled the rear OEM light this weekend and mocked up the led w/o resistor. Tried using the turn signal and after a blink or two it started fast blinking and I got a message on the dash saying the lamp was out. Guess I'll be installing the resistors after all.
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post #6 of 8 Old 07-21-2014, 01:11 PM
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You'll need to match the resistance of the filament in the factory bulb by adding resistors when installing LEDs in turn signal locations.

It's a pretty standard procedure, and is to be expected (LEDs draw in milliamps)

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post #7 of 8 Old 07-21-2014, 03:18 PM
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If you're model year has the bulb out indicator, it is likely you'll need two resistors for each bulb. The 3157 has two circuits/filaments.

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post #8 of 8 Old 07-21-2014, 09:35 PM
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Quote:
Originally Posted by BumpInTheRoad View Post
If you're model year has the bulb out indicator, it is likely you'll need two resistors for each bulb. The 3157 has two circuits/filaments.
I'm running Truck-lite 4" round LEDs on mine and had the fast flash and bulb out fault during the install but the resistors corrected it. Didn't have to clear any codes, it just started working right once the resistors were connected. You can get a standard harness pigtail with the resistor already built in. It has been almost a year since I bought mine, but can look up where I got them if you like. Shoot me a PM, as I'm not subscribed to this thread.

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