Motor Vehicle Maintenance & Repair Stack Exchange
Motor Vehicle Maintenance & Repair Stack Exchange

Questions tagged [led]

Light Emitting Diode

Used in the automotive industry as a long lasting, low amperage, high output replacement for the incandescent bulb. First turned up in brake lights due to its ability to become fully lit in a fraction of the time of incandescent bulbs.

The first visible-spectrum (red) LED was developed in 1962 by Nick Holonyak, Jr., while working at General Electric Company.

51 questions
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OEM LED tailights: white vs red LEDs under red plastic

Hopefully this is a suitable stack for this question. I cannot think of any other place to ask. This is about OEM tail lights with LEDs under translucent red plastic covers. I have noticed on several cars where the plastic cover is broken that the…
DoxyLover
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Mini Cooper 2003 - Changed lights to LED, insanely fast indicator lights now

Changed all the lights on my Girlfriend's Mini Cooper last weekend, since then the indicators have been going crazy (assuming due to power consumption being very low). I know you can replace the relay for the lights so that it works with LED…
Andy Holmes
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How can I secure the power block for my LED headlights?

I purchased an LED low-beam conversion kit and installed it yesterday in my 2010 Forester. The installation was easy enough, other than having to move the battery to get enough space to fit my headlight. However, I am not sure whether I've done…
Joe
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A very simple circuit to supress 12v pulses from illuminating some LEDs

I have recently acquired some Cree LED headlight bulbs for my ageing 5-series. They are amazing enough to actually make the vehicle safe to operate at night. The stock incandescent bulbs were woefully inadequate. Unfortunately, and legal grey areas…
Toby Wilson
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Replacing interior lights with LEDs (2003 Jeep Liberty)

I replaced the bulbs in the interior dome lights in my jeep with LED's. In front, there are two lights - driver and passenger. In back, there is one. The old lights were too dim, the new LED's are great - much brighter. They are supposed to turn on…
joeking
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Why is my LED turn signal "randomly" blinking too fast?

I have recently changed my motorcycle front blinkers from OEM to LED ones. I did not add resistors: I just plugged the new blinkers into the on-board computer. The right blinker is blinking correctly, by correctly I mean the same speed as with the…
dotixx
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LED Blinkers - Burning out on 1976 Triumph Bonneville

I have a 1976 Triumph Bonneville and recently replaced the garbage LED chips inside the eBay signal lights with brighter Cree LED chips. I bench tested the circuit shown below with a 12v bench supply and everything worked perfectly. I also tested it…
Pipi Pipongo
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Planning to replace hid bulb to led H1 connector

I have Honda city 2016 model (Indian version). I had changed the factory halogen bulbs to AES projector with H1 connector type. Recently one of my hid 5000k bulb gone bad. I'm planning to replace the existing hid bulb to LED bulb. Question 1:…
user3179298
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What causes my LEDs to briefly and faintly turn on?

I replaced my car interior light with a Chinese LED strip about 80 cm long, the usual ones with 3 LEDs in series with a 75 ohm resistor. This is the circuit. The diode helps drop some excess voltage, since the battery provides up to 14V and the…
FarO
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New LED 3rd brake light stops working

Swapped out LED taillights and third brake light on my '05 Sierra. Tail lights work fine but the third brake light will work when first plugged in but after a short while the cab lights don't work.
scott
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How to fix 2007 Mercedes SLK daytime running lights?

I've got a 2007 Mercedes-Benz SLK (R171). My daytime running lights have died, and I'm a little puzzled as to how to go about fixing them. The stock headlights have been replaced by aftermarket hardware, that contain LEDs for the DRLs. They worked…
Kallja
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Brake/position LED Lights

I have a problem with the rear right brake/position light on a 2005 Mazda3. Same LED lights (8 led) shine dimmer when lights are on (state 1) and goes brighter when brake are pressed (state 2). My right light has a problem it works good on state 1…
ebilcari
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12V relay circuit not working

I have a pair of LED lights wired on my truck to a 12V 4-pin relay all correctly with a switch. The system worked great every time until I decided I wanted to add a small 5mm LED, so when I turned them on I had an indication in the cab of the truck…
user168694
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Volvo V60/S60 <2012 LED bulb replacement

The LED bulb unit that sits between the headlamp assembly and the rad has gone. I have bought a new complete unit (two led strips inside) but cannot see how to unplug the old one and plug in the new one. It looks like I have to take the bumper off…
Adrian
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New LED tail/brake lights not working on my Toyota RAV4

I tried replacing my tail/brake lights for my 2013 Rav4. Dual purpose bulb. Replacing with the LED bulb and with the headlights on (i.e. tail light on), results in the brake lights always on. With headlights off (i.e. tail light off), the brake…
dashman
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