How-to guide

How To Install LED Light Strips In A Car

Want to add some AMAZING style and color to your ride? Not only can you do it yourself, but you can also get great results for less than the price of a pair of speakers!

I’m passionate about helping others so I worked hard to put together this detailed do-it-yourself (DIY) guide to show you how to install LED strip lights in a car. You’re in luck as some of today’s LED light kits are not just great looking but cheap, too.

In my extensive guide I’ll show you how I installed this really cool and affordable color-changing LED set I picked up at Amazon.

Be sure to check out the results in my video at the end!

Contents

Infographic – Car LED light facts and tips

Car LED facts and tips infographic


What are LEDs?

What is an LED illustrated diagram and examples

Light emitting diodes (LEDs) are semiconductor components that produce light. Semiconductor are basic electronic elements made up of silicon and other elements that allow electrons (electrical current) to flow in certain ways. Diodes are “one-way valves” which allow current to flow in only one direction. An interesting property is that they also produce light you can see. An anode (positive lead) connects to a positive power supply and the cathode (negative lead) connects to the ground or (-) wire. 

Light emitting diodes (LEDs) are one of the most important components in the electronics world. They’ve been around for decades but in the last 10-15 years or so they have become increasingly useful in our everyday lives. This includes uses in both home and car lighting, too.

LEDs work on the principle of semiconductor junctions. In other words, they contain 2 different materials like silicon and germanium bonded together to form a junction – or bridge – that forms a diode.

Diodes are extremely important to the electronics world as they’re electrical one-way valves, so to speak.

That principle is the basis of microscopic transistors which are what allow microprocessors and many other modern technological miracles to work.

The tiny components like the LED chip (the semiconductor materials themselves) are very sensitive but are sealed in an extremely hard and durable epoxy housing. Wires are bonded to the tiny components for connecting power.

If you’d like to read more about the different types of LEDs check out this page.

How LEDs produce light

Diodes have a special side effect when they pass electricity – they produce light! The color of the light produced depends upon the materials used to make them.

Over the years more and more companies have improved upon them and now produce cheap, great-looking LEDs that can produce light in a variety of colors.

Unlike regular light bulbs, however, LEDs actually work on a low voltage (say around 1.5 volts or so each). This means they have to be protected by a resistor to keep too much current from flowing which would cause them to burn out.

Resistors are used with LEDs when a car voltage (normally somewhere around 12V) is used to power them.

LEDs vs light bulbs vs neon

LEDs have a several advantages over incandescent (filament-type) bulbs and neon tubes as well. Here’s a comparison table highlighting some of the pros and cons of the three types.

CriteriaLED bulbsLight bulbsNeon tubes
Power useLowModerate-highLow
CostLowLow-MediumMedium-High
VoltageLowLow/as requiredHigh (requires special power supply)
DurabilityExcellentPoor – moderatePoor-moderate
Life expectancyExtremely high (tens of thousands of hours)Low-Medium (hundreds of hours)Low-Medium (hundreds of hours)
“Soft” glow effectPoorFairGreat

As you can see from the table, LEDs have significant advantages in nearly every category that matters. They’re more cost-effective too.

It’s not just because they’re so durable and have an extremely long useful life (in the 10, 000 of hours, typically) but also because they need a lower voltage to work.

One drawback is that they can’t reproduce the “soft glow” of colors like neon gas can, but that’s a minor drawback overall. When done well they still look great!

How do multicolor RGB LEDs work?

Image of RGB LED example

Image showing a multicolor red-green-blue (RGB) LED up close. These LEDs are actually a combination of 3 separate red, green, and blue LEDs built together. Today’s multicolor LEDs are very tiny and some are only a few millimeters in size!

Multicolor red, green, and blue (RGB) LED are basically 3 separate color LEDs designed into one small package. Just like in images your computer monitor or phone’s liquid crystal display (LCD) produces they are used in various brightness combinations to form different colors.

RGB LEDs have 3 connections: one for each color. But using a specially designed LED controller the 3 colors can be driven at different brightness levels and various hues of colors are produced.

Additionally, of course the basic red, green, and blue colors can be produced as well. The amount of variations in color and brightness produced depend on the ability of the controller used.

How do LED light strips work?

How LED light strips work diagram

Diagram showing the design and basic operation of car LED light strips. The 12V supply is used to supply a light strip controller which drives each light strip with separate red, green, and blue on/off waveforms. These waveforms are how brightness and color combinations are produced. Resistors are required to limit the amount of current each LED segment can receive.

LED light strips worked by being driven by a special power supply which controls the amount of time (and which color) LEDs are switched on and off. 

While simple single-color LED strips don’t need a power supply, they’re incapable of having different color combinations and special features like dimming or pulsing with music sounds.

An LED controller makes this possible in more advanced light strips by using very fast switching on/off with separate wiring for each individual RGB color.

Image of LED light strip up close

LED light strips contain an evenly space set of multiple RGB LEDs and resistors wired in parallel. When powered, each color receives a separate on/off signal from the LED driver controller box. This allows a variety of brightness levels and color combinations.

The longer the on time is applied to an LED, the brighter it will appear to your eyes. If one color is turned on more than the others that color will appear more prominent. (For example, if blue is turned on more often than red, you’ll see a color mix with more blue in it)

Each light strip connects in parallel with other light strips by design in most light sets.

Choosing a great LED light strip set

Example of LED light strip set for car interior

Car LED light strip sets like this popular one from Amazon that I've tested are a great deal for the money and offer a lot of options including color-changing, a remote, and pulsing with your music.

Getting a good LED light set is definitely important. There are so many sold today it can become a headache when shopping!

Although you can buy a simple single-color light strip set for around $10 (like this one here) I recommended spending just a few dollars more.

My advice is to look for one with the following features:

  • Good buyer reviews and happy users
  • Fairly installer-friendly
  • Offers multi-color modes
  • Music mode to change with sound
  • Color rotation modes (gradient, fast, etc)
  • Brightness control

You don’t need to spend a lot – say $30 or less. Here’s a great example of a light strip set that does all this and more for a great price.

Instructions included with Chinese products like these can be hard to understand, so be ready for that!

Supplies, tools, and your shopping list

Inspirational example of notebook checklist

It’s really smart to make a list of what you’ll need before getting started. It only takes a few minutes and can really help you be better ready for the specifics of installing in your vehicle!

I recommend making a basic list of what you can expect to need before you begin installing LED lights in your vehicle.

Tools:

  • Multimeter (for measuring voltage) – preferred over a test light
  • Crimp tool for crimp connectors
  • Screwdrivers and etc (as needed for your vehicle)
  • Wire-cutting pliers or pliers with a wire-cutting feature

Image of recommended car stereo installation tools

I highly recommend getting an inexpensive but good multimeter (left) like this best-selling budget model from Amazon and a wire crimp tool and wire crimp connectors (right) before starting your installation. You’ll get professional results and it will go much more easily, too[!

Supplies:

  • Wire (“zip”) ties (usually sold in a bag of 100 or more), 6″ length or similar
  • Wire crimp connectors (small assortment)
  • Roll of electrical tape
  • Good quality fast-drying glue
  • Fuse tap adapters (if wiring from fusebox)

Example of LED light car interior installation supplies recommended

If you’re mounting the light strips to flat (or other material) surfaces, I really recommend using a great glue like this fantastic Gorilla super glue gel that’s easy to work with. For making your installation wiring neat or mounting lights to wires or other nearby objects, definitely pick up some small wire ties like these.

While it might not seem important now, I strongly recommend picking up a pack of wire ties. They’re incredibly useful for keeping wires held together and nice and neat.

They’re also very handy for mounting light strips to metal braces or nearby wiring (and other objects) underneath your dashboard and seats.

Installing LED lighting in your car: getting started

You’ll need to do just a few major steps to get your LED lights installed. The good news is that in most cases it’s not that hard! It does take a little while to do it right, but it’s well worth it!

You’ll need to plan to do the following:

  1. Wire the controller (or lights directly) to a power source of +12V and ground
  2. Mount the light strips securely
  3. Test and verify operation

In most cases you do not need to run any wiring to the battery. LED lights uses only a relatively small amount of power so in most vehicles they can be connected to the factory stereo or cigarette lighter socket wiring.

There are also a few more sources I’ll mention later.

How to wire 12V LED lights in a car

Image of cigarette socket adapter for car LED lights

Many sets include a cigarette lighter plug with an on/off switch included. While using the cigarette socket to power the set is an easy option, it’s not the best or neatest way. However, for temporary use it’s ok.

While LED car interior light sets often include a cigarette socket power plug, that’s not the best option. Ideally, you’ll want hardwire them to turn off with the ignition switch just like the car stereo.

LED light strip wiring diagram

LED light strip wiring diagram

In order to power the set you’ll need to hardwire it to an accessory wire to get a +12V supply that switches on or off with the ignition.

You can normally find a wire that works for this in one of several places:

  • Behind the car stereo (usually the first option)
  • At the cigarette lighter socket wiring
  • At the fusebox in the vehicle interior

How do I find a +12V accessory (“ACC”) wire?

1. Look up your vehicle’s wiring colors

I recommend looking for wiring color codes for your vehicle at The12volt.com. In most cases you’ll find the colors and description for your car or truck’s wiring.

If that doesn’t work out, it’s ok. We’ll fall back on plan #2.

2. Test wiring until you find a suitable wire

For this step you’ll want to use a digital test meter (as I mentioned earlier). The main reason is that in modern vehicles not all wiring is 12V.  Some now have signal lines or other wiring with voltages below +12V.

Caution! A simple test light cannot show you the real wiring voltage and can cause potential problems with the vehicle. Using a test light can lead to using a lower-voltage wire by accident which can cause problems with your LED lights.

You can try removing the radio and, with the ignition in the ACC position, check wiring until you find +12V wires. Then test again with the ignition off to decide which are suitable.

3. Tap off of the fusebox

Example vehicle fusebox locations

A vehicle’s fusebox containing a power source for the radio – and your LED set – is usually in one of a few places. (Above) Under a panel in the dash itself or (below) in the lower driver’s side of near the brake pedal. The owner’s manual normally has labels for the fuses.

Additionally, another option is connecting to a power source at the fusebox. They’re typically found at the left side of the dashboard, either near the lower left-hand side of the interior or under a panel in the dashboard itself.

You can use the vehicle’s owner’s manual to show you which fuse is for what purpose. Most vehicles have one for the radio power that you can tap off of.

Mini and micro fuse wiring adapters examples

Fusebox wiring adapters make it pretty easy to tap off of a power circuit for installing LED lights. You plug them in place of the original fuse and then connect the power wire.

If tapping off of the fuse box consider picking up a fuse wiring adapter. They can make it so simple!

If you don’t have an owner’s manual you can use a test meter to check fuse power with the ignition on and off until you find a suitable one. Then use a fuse tap adapter or other connection to attach the LED power wire.

Here are some great ones which will make installation much easier.

Connecting the wiring

Once you’ve found a suitable source for power, you’ll need to:

  • Connect the LED power wire
  • Ground the negative power wire

Here’s a helpful diagram with some ideas clearly explained.

How to hardwire car LEDs instructional diagram
Mounting your LED light strips

As many light sets (like the one I’m using here) have the light strips permanently attached to the control box, wire length is limited. However, there should be enough for most

I measured about 48″ (122 cm) and 58″ (147 cm) for the front and rear lengths on mine. That’s about 4 ft (1.22 m) and 5.6 ft (1.7 m) in length for each front and rear pair.

Interior light strip locations

Car LED light strip interior location diagram

Diagram showing typical locations for the LED light strips in a car interior. Great locations are under the dashboard for the front 2 and either on the front or rear of the seats. Use the light strips with longer length cables in most cases.

Ideally you’ll install your light strips (assuming you have 4, which most sets do) here:

  • Left & right front: under dashboard, facing down
  • Left & right rear: under/on the front or rear edges of the front seats

Be sure to have them facing the areas you want the light glow to appear on.

You can also test them temporarily using some good quality tape to hold them in place before installing them permanently.

Locating the controller

Car LED light controller installation example image

The LED light set controller (for those having a remote control and/or sound sensor) needs to be accessible from the remote should be able to sense sound properly. Install it on one side of the dashboard center console where it can be hidden a bit . Most likely the driver’s side is best (as shown in the diagram above).

LED controllers which offer remote control usually use an infrared receiver (IR) type of sensor. These need a direct line-of-site to the sensor in the control box.

Additionally, models (like the one shown here) have a sound sensor internally, too. In both cases you’ll need to place the control box where it’s not covered totally and where the remote can work with it. Normally I suggest the driver’s side, hidden slightly underneath the dashboard.

Installing the light strips and cables (and why adhesive strips may be a bad choice)

Installing LED light strips in car interior diagram

The diagram above shows 2 great ways to install the LED light strips in your vehicle. I no longer recommend self-adhesive strips, even included on the light strips. After being exposed to heat in a car’s interior they often fail.

While LED light strips typically include a self-adhesive tape on the back of the strips, it’s often not reliable. The reason is that the adhesive fails after multiple sessions of heat exposure, vibration, and being kicked by feet in a vehicle.

For that reason I recommend the two methods I mentioned earlier:

  • Use a high-quality glue for attaching to under-dash plastic panels
  • Use wire ties to fasten light strips to vehicle wiring bundles or dashboard brackets

Using a high quality gel super glue like the Gorilla Glue is a great idea. Although it may sound permanent, you’ll only need a few small drops (about 4 to 5) for each light strip. The glue dries quickly but gel glue is easy to work with and quite strong.

Be sure to clean any surfaces beforehand with alcohol and a cloth, an alcohol pad, or a good surface cleaner. Silicon and other protective products like Amor All leave a residue that prevents glue from adhering well.

Additionally, wire ties are easy to use and allow for a lot of creative installation ideas. Nearly any nearby object or hole can be used to support a light strip.

Attaching light strips to seats

Similar, after attaching the light strips underneath the dash, you can do the same for the seats as well.

If you’d like to avoid using a permanent glue, you can also consider using genuine Velcro. Generic velcro tends to have poor quality adhesive and won’t last long.

Where possible, try using wire ties on the seat frame if available. Wire ties are very strong yet can be cut and removed later without any permanent damage.

Final notes and demo video

An example of the kit installed in a Toyota sedan. The results are great!

Adding LED lights to your vehicle’s interior is a great project you can do yourself!

The results are nothing short of awesome!

Following my guide you can now get the follow great results:

  • Hardwire LED lights for a clean installation
  • Mount the LED light strips securely
  • Enjoy your car, truck, or vehicle even more

As I mentioned before, this multi-color car LED light strip kit I picked up from Amazon is a great buy and pretty easy to install. It’s also affordable and well-reviewed.

Speaking of taking your ride to the next level…got an amp yet? If it’s time for an upgrade, have a look at my list of the best 4 channel amps for sound quality.

Got questions, suggestions, or ideas? Feel free to comment below or send me a message.

Your comments are welcome!

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