LED Bulb Conversion Issues
Thread Starter
Burning Brakes
Joined: Oct 2008
Posts: 1,091
Likes: 45
From: Albuquerque New Mexico
LED Bulb Conversion Issues
So today I converted all my exterior bulbs to LED (previously did the headlight low beams but not high beams and still have to do fog lamps). This including both front corner bulbs on each side, rear side markers, license plate lights, reverse lights, and taillights. Everything works fine except when I try to use the turn signals. Now they blink faster but that's only when I'm using the DRLs during day time driving. When I turn on my headlights as if I were driving at night the turn signal doesnt work and the arrow I'm using just stays lit with no flashing (with a buzzing noise coming from the relay). I did install a hazard relay as in the past my signals had a hard time working in general but the relay helped 100% with that till now. It makes a weird buzzing noise any time I try to use my turn signal with the headlights up. I dont know what to do or how to fix this issue. Any help is greatly appriciated, Thank You!
Instructor
Joined: Nov 2019
Posts: 226
Likes: 21
LED headlight bulbs and LED DRL cause electrical problem with these cars. Do a google search. You’re going to need a hyper flash harness and probably some resistors for your headlights. But even then things may not work properly.
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I agree - a hyperflash harness should solve your issues.
Instructor
Joined: Oct 2016
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From: Indiana
Night Owl for life
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From: Bugs Bunny should'a made a left turn here
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Intermediate
Joined: Jun 2019
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From: Maryland
I have no issues with my LEC conversion. I have change my headlights, DRL, Tail lights and the front marker lights (signals) and interior lights. The headlights (ACA style) run directly to the battery with the supplied harness and relays. This was a manufacturer recommendation to prevent problems. The corner lights which are switch backs, resistors where placed on them to prevent any hyper-flash. I also installed an hyper-flash harness, when I did the taillight conversion which are halo-leds. Over-kill maybe but as stated all my lights work without issue. As many have said the first thing I would do is a hyper flash harness which is very simple to do. If you have problems after that then try the resistors on the corner lights.
Night Owl for life
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From: Bugs Bunny should'a made a left turn here
Instructor
Joined: Jul 2012
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From: Strafford, New Hampshire
I put a hyperflash harness in my 97 and still had to put resistors on my brake lights or the traction control service light would come on. I haven't done any other led conversions yet. Hope all goes well.
Le Mans Master
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Heel & Toe
Joined: Aug 2019
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From: Danville, CA
When I bought my 2002 C5 a few months ago it had the rapid flashing turn signals due to the LED light change. I looked on Youtube and saw several videos on the hyperflash. I installed it and the turn signals work as they should.