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Dodge Ram Trailer Wiring Color Code

Dodge Ram Trailer Wiring Color Code

Here is a typical Dodge Ram trailer wiring color code for the 7-way connector:

  • Yellow: Left turn signal and brake light
  • Green: Right turn signal and brake light
  • Brown: Tail lights and clearance lights
  • White: Ground wire
  • Blue: Electric brake controller output
  • Red: Reverse lights
  • Black: 12V power supply for trailer battery charging or auxiliary functions

Dodge wiring color codes diagram and image

The Dodge Ram trailer wiring color code for the 7-way connector is as follows: White – Ground (G), Brown – Tail Lights/Running Lights (TL/RL), Red – Brake Lights (BL), Blue – Auxiliary Power (Aux PWR), Black– Electric Brakes or Trailer Battery Charge Line(EB/TB CL) , Yellow– Left Turn Signal(LT SGL), Green– Right Turn Signal(RT SGL).

 The colors are based on a standard industry format and may be different from other manufacturers. When connecting your trailer to your vehicle, it is important to confirm that each wire connects correctly according to the manufacturer’s recommendations.

When it comes to connecting your Dodge Ram trailer wiring harness, the color code is essential for a successful installation. Knowing which wire does what helps make sure that you don’t run into any problems on the road.

Common colors used in Dodge Ram trailers include white for ground, brown for tail lights, green and yellow for turn signals, purple and blue for brakes, orange and red for auxiliaries as well as black for power out.

It’s important to double-check all connections before taking off so that you can enjoy a safe journey with your trailer!

What is the Color Code for Trailer Wiring?

The standard color code for wiring a trailer is as follows: White or ground wire, brown for running lights, yellow for a left turn and brake lights, green for a right turn and brake lights, and blue for brakes/auxiliary power; black usually goes unused but can be used as a hot wire in some applications.

The other colors may vary depending on the type of trailer connectors you are using. Generally speaking, the four primary wires (white, brown, yellow, and green) are always the same regardless of connector type.

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What is the color code for 4 pin trailer wiring?

There are four primary colors: green for brakes, yellow for left turn and brake signals, brown for a right turn and brake signals, and white for ground. Brakes use the green wire, as it allows the driver to control the trailer and prevent runaway situations from occurring.

How to wire a trailer with 4 wires?

First, you will need to gather the necessary supplies. These include a four-wire trailer harness, 14-gauge wiring for the center and brake positions, 16-gauge wiring for the running and turn-signal lights, and an assortment of crimp terminals and some heat-shrink tubing. 

Once you have the materials, you can start wiring your trailer. You’ll begin by routing the four-wire trailer harness around its frame, connecting it to the appropriate positions. 

What are the 5 Colours in trailer wiring?

Yellow – This colour is used for the left turn and stop signals. The blue wire is connected to the brake and turn signal lights. 

White – This colour is used for the side marker lamps. T

Brown – This colour is used for the Taillights. 

Blue – This colour sends a battery charge back to the Reverse lights. T

Green – This colour is used to turn the right turn and stop signals in the trailer when the tow vehicle is in reverse. The green wire is connected to the right turn and stops signals.

How do you test a 4-pin trailer wire?

  1. Start by cutting off any excess wire not needed for the trailer connection. Don’t forget to cover any sharp edges with electrical tape.
  2. Next, turn off the power to the trailer and disconnect the negative terminal.
  3. On the 4-pin trailer connector, use your multimeter to check the resistance between each pin. This can help you identify any broken or frayed wires in the connection.
  4. After that, use the trailer light tester to make sure the circuit is properly connected. If the trailer lights function correctly, you have a good connection.
  5. Finally, use zip ties to secure the connection if needed. This will help prevent vibrations from disrupting the connection.

What are the 5 wires in a 4 plug trailer?

The standard four plug trailer connection has 5 wires, in 4 different colors– white, yellow, blue, green, and brown. Each of these wires carries a different type of functionality and you must know what each one can do.

What is red wire on trailer?

 A red wire on a trailer is typically used as a turn signal wire. This wire connects the trailer’s lighting to the vehicle powering it. 

How Do You Wire a 7 Pin Trailer Plug?

When wiring a 7 pin trailer plug, the first step is to locate the manufacturer’s instructions and determine which of the seven wires in the cable carries which function. The basic functions are Stop Lights (or Tail lights), Turn Signals, Electric Brakes, Auxiliary Power Supply, Reverse Lights, Right Rear Turn & Marker Light, and Left Rear Turn & Marker Light.

Once you have identified each wire’s purpose you can begin connecting them to the corresponding terminal on your 7 pin trailer plug.

Connect each colored wire from the trailer to its corresponding terminal on the plug; white for ground/earth, blue for electric brakes or aux power supply (depending on vehicle type), brown for tail lights/running lights, etc. Finally, ensure that all connections are secure and test out any attached lighting before driving away.

What Wire is Blue on 7 Pin Trailer Wire?

The blue wire on a 7 pin trailer wiring harness is typically used for the reverse light, which illuminates when the vehicle is placed in reverse and signals to other drivers that you are backing up.

It may also serve as an auxiliary power source for other accessories like brake controllers or RV appliances. When connecting the wires together, it’s important to make sure the colors match up properly so that everything will be working correctly.

The blue wire should always be connected to its corresponding color on both ends of the connection – failure to do this can result in damage or malfunctioning of your equipment.

What Wire is Blue on 7 Pin Trailer Wire

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What is the Red Wire on a 7 Pin Trailer Plug?

The red wire on a 7 pin trailer plug is typically associated with the right turn/stop circuit. The purpose of this wire is to provide power for the brake lights and tail lights when you activate your right turn signal or apply your brakes. This wire also serves as a power supply for the reverse light when it senses that you are in reverse gear.

It’s important to make sure this wire is connected properly, as failure to do so can lead to serious safety issues while driving with a trailer attached.

Dodge Ram Wiring Harness Connectors

The Dodge Ram’s wiring harness connectors provide a streamlined connection between the truck’s electrical system and its components.

These durable connectors are designed to withstand the harsh conditions of any environment, making them essential for ensuring reliable performance over time. They also come in different sizes to fit various parts, making it easy to find one that fits your specific model.

With proper installation and maintenance, these wiring harnesses can last for many years of use.

Trailer wiring diagram 7 pin


In conclusion, wiring up a trailer to your Dodge Ram can seem overwhelming at first. However, as long as you have the right information and understand the color coding of your vehicle’s wiring harness, it is fairly simple to connect your trailer properly.

Knowing which wire goes with what color will ensure that you are able to power all of the components on your trailer correctly. With this knowledge in hand, you’ll be ready to tow safely and confidently!

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