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What Is Tail Light Diode Wiring And How To Protect It From Damage?

The vehicle’s lighting system has various lights that provide safety on the road. One of them is the tail light installed at the rear side of the vehicle. It also includes the wiring process of this light so that it can illuminate properly. A tail light diode wiring includes various steps of connecting the wires. 

There are many advantages to installing diode tail lights. It makes the other drivers aware of your presence on the road by lighting up the vehicle’s rear end with a red hue light. As a result, there are fewer chances of collision between vehicles. It is essential to fix the tail light once they get damaged. Get ready to know everything about the wiring of the tail light diode.

What Are Tail Light Diodes?

The tail light diodes are installed at the rear side of the vehicle. The material used in this light is a diode, a two-lead semiconductor. All modern vehicle’s tail lights come with a diode and are designed with a special type of semiconductor. The light’s reflective material helps in amplifying the brightness for longer distances.

Moreover, the governments of various states in the US also make it compulsory to use red colored diode tail lights. At the time of installation, these lights are wired by professionals so that they can work in combination with headlights. During the drive, the tail lights appear dimmer, while it gets brighter when you push the brakes.

What Is The Color Code Of Tail Light Wires?

The working of the tail lights depends on their wiring. Each of the lights is connected with different wires. Each wire has a different color and performs a distinct function. Understanding the wire’s different colors can be frustrating when you try to fix the tail light wiring for the first time. So, it is essential to know the different color codes of tail light wiring.

Let’s understand the different color codes of tail light wiring. 

It is a four-colored wire that connects with a different part of the light wiring system. These color codes vary in the country, and the government provides these color codes for vehicles. A single wrong connection of wire can result in a malfunction of lights that can also lead to an accident.

Different Color Codes Of Tail Light Wiring

The color codes of the tail light wires are divided into pins. These pins help in understanding the function of wire. For example, the famous vehicle manufacturer Ford divides its tail light diode wires into seven pins.

  • The ground wire
  • A brake controller wire
  • The tail light wire
  • A battery power wire
  • Left turn signal wire
  • Right turn signal wire
  • Reverse and auxiliary light wire

Let’s understand the various color codes in detail.

Ground Wire

The ground wire is the same as any wire of a simple lamp. It is easy to locate and consists of black or white color wire.

Left And Right Turn Signal Wire

The wires of the left and right turn signals are attached. The color of the right brake signal wire is light blue. On the other hand, the color of the left turn signal wire is light green. You will find both of these wires under the vehicle.

Park Light Wire

The wire of the parking light is connected to Pin 4. Also, the color of this wire is brown.

High-Mount Stop Wire

The color of the high-mount wire is green. It is also called an extra hot wire and is found beneath the step plate of the driver seat.

What Is The Difference Between Brake Lights And Tail Light Diodes?

The brake lights and tail light diode are located at the vehicle’s rear end. The majority of people are confused between these two lights. Here is the difference between these two lights: 

Brake LightTail light
Brake lights are located at the rear end of the vehicle. It glows brighter when you press the brakes.Tail lights are located at the rear end of the vehicle. It glows whenever the vehicle’s headlights are on.
It is mandatory by the US government in various states.It is also mandatory by the US government in various states.
The brake light has higher luminosity.The tail light has a lower luminosity than the brake light.
This light works as a specific signal of slowing down.This light works as a signal for other drivers.
It is located between the left and right brake lights.It is located at the vehicle’s rear end with the indicator lights.

How To Wire The Tail Light Diode By Yourself?

The tail light diode wiring process depends on the vehicle type and dinghy tow system. If the signal lights in your vehicle have a separate circuit from the brake lights, then you have to perform the wiring separately. Follow these simple steps to perform the wiring of tail light diodes:

  • First, identify the type of brakes and turn signals in your vehicle. Two types of lighting systems in the vehicle are separate and combined. In a combined system, the tail light flashes for the turn signal. On the other hand, tail lights work separately from the brake lights in a separate light system.
  • Next, expose the wires with the sharp object behind both tail light assemblies. After that, use the circuit tester to identify the wire of the brake light, turn signal, and tail light.
  • Divide the wire into sections and include the split loom to protect the wires. Next, use the additional wire to secure each tail light wire.
  • Now, attach the diodes after reading the instructions in the manual. You will get the manual guide with your new tail lights. Next, separate the bonded wires and attach the tail light wires to the diodes.
  • After that, peel off the remaining wires and connect them to the other side of the diode. In addition, use the ring terminal and self-tapping screw to attach the ground wire. If necessary, drill the hole and seal the wire with a silicon sealant.
  • Once you route the wires, choose the mounting point for the tail light’s socket. Attach the socket to the mounting point if your vehicle has an EZ4 or EZ5 baseplate. Next, attach the wiring to the inner plug of the tail lights.
  • Apply the silicone sealant to fix the wire in position. After that, set the screws to make the socket weatherproof. Assemble the socket and other components of the tail light.

Once you complete the above steps, test the tail lights. If you face any problem, ask for professional help. A single error in the wiring of light can result in malfunction. Therefore, it is essential to take the help of a tail light wiring expert to solve the issues.

Why Should You Hire A Professional For Tail Light Wiring?

The above wiring process of tail light requires a good knowledge of electro-mechanics as the process is complex and involves connecting the different wires. So, hiring a professional to wire the vehicle’s tail light is recommended. 

Safety Of Vehicle

One of the major reasons for hiring a professional for tail light diode wiring is the vehicle’s safety. The process of wiring includes connecting the different wires of the tail light. A wrong attachment of wire can result in light damage. When you hire an expert, they perform the wiring process by taking care of your vehicle. In addition, there is also a guarantee on the wiring service.

Experience & Training

The experts who perform the wiring of tail light diodes have years of experience. When you hire these experts, they perform the process correctly. So, there is no risk of future damage to your vehicle’s tail light. Moreover, there is also a security of quality service as most experts are certified.

Saves your time

When you perform the wiring of the tail lights by yourself, it takes time. Additionally, there is confusion at each step regarding the wire terminology. But when you hire a professional, it takes less time to complete the process as expected. On the other hand, they also suggest possible ways to enhance your vehicle’s lighting.

Cost-Effective Option

Hiring a professional for tail light wiring is cost-effective compared to the DIY approach. First, you save the cost of buying the additional tools or accessories required to perform the DIY process. When you hire the vehicle’s light wiring expert, they bring their own tools. On the other hand, a single mistake made from your side during the wiring can cost you more in the future. Once you pay the service charge, the wiring process has no extra expenses.

Less Stress For the Future

The wiring of the tail light is performed for the long term. There is the possibility of future errors when you perform the wiring process yourself. However, it is different when you hire a professional. These experts guarantee their service and are responsible for any future errors. So you can easily contact the expert if any problem occurs with your tail lights.

Tips On Protecting Diode Tail Lights From Damage 

Once your expert completes the wiring process, the next step is to keep the tail light in good condition. The main reason behind getting the damage in tail light is due to regular condensation. When it continues for a more extended period, the wiring of the light gets damaged. So, you have to perform the steps in order. Here are the tips on protecting the tail lights diode from being damaged:

Remove The Tail Lights

The first step is to remove the tail lights. Next, use the screwdriver to open the screws and remove the tail light from each side. Here you can take the help of a professional at this step.

Detach The Bulb

Now, detach the bulb from the socket and drain out the water. You have to be careful here with the wiring of the tail light. 

Clean The Bulbs And Frame

The next step is to clean them inside with the help of a dryer. After drying, wipe the surface with a cloth or paper towel. Now, resemble the tail light without damaging the wire.

By following these tips, you can protect your vehicle’s tail light from being damaged.


The tail light is an essential lighting system that provides signals to other people on the road. The process of tail light diode wiring is complex. We have mentioned the steps to perform the wiring process in order. You can also hire our professional service in diode tail light wiring. Bills Mobile Hitch And Tow Bar Installation provide wiring service in the vehicle lighting system. 

We have certified experts who perform the wiring process by taking care of your vehicle. Our services include same-day assistance, affordable price, and quality products. We also provide towing equipment and installation service in Glendale. For more info or queries, contact us at (623) 210-5427.


How Much Cost Is Required For Wiring The Tail Light?

The average cost of wiring the tail lights is $80 to $100. 

How Does The Tail Light Diode Work?

The working of the tail lights depends on the relay. It helps in the functioning of the lights in a combination of headlights. Furthermore, the tail lights also work with the battery of the vehicle.

Are The Tail Lights The Same As The Vehicle’s Rear Lights?

Tail lights are not the same as the rear light of the vehicle. In addition, these lights are part of the lighting system, including signal, brake, reverse, and turn lights.

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