If you own a cargo trailer, it is important to ensure that it is wired correctly. A cargo trailer that is not wired correctly can lead to problems when it comes to powering internal systems and charging the battery. In this article, we will provide a detailed guide on how to wire a cargo trailer. We will also provide an easy-to-follow wiring diagram that will help you wire your trailer correctly.
Why is Proper Wiring Important for a Cargo Trailer?
The wiring of a cargo trailer is important because it powers all of the internal systems. This includes lights, appliances, and other electrical devices. Proper wiring is also necessary for charging the battery. A poorly wired trailer can lead to electrical problems that can damage the internal systems or even cause fires.
Moreover, the regulations require the wiring of any trailer to be safe and functional. It is essential that the trailer is wired to meet the standards, which is important for safety during traveling.
Wiring Basics
The first step to wiring a cargo trailer is to understand the basics. The main components of a trailer wiring system include a battery, a converter, a fuse box, and wiring. You will need to ensure that all of these components are in good working order before wiring your trailer.
Battery
The battery is the power source for the trailer. It is important to choose the right battery for your trailer. A deep cycle battery is the best option for a cargo trailer because it is designed to power electrical systems for long periods. A standard car battery is not suitable because it is only designed to power car accessories for a short time.
Converter
The converter transforms 120-volt AC power into 12-volt DC power that can be used by the trailer’s electrical systems. This allows the trailer to be powered by a standard power outlet. The converter should be mounted in a dry and protected area of the trailer.
Fuse Box
The fuse box protects the wiring from damage caused by power surges or short circuits. It is important to choose the right size fuse for each circuit to avoid overloading the wiring.
Wiring
The wiring connects all of the electrical components in the trailer. It is important to choose the right gauge of wire for each circuit to avoid overloading the wiring. The wiring should also be protected by conduit to prevent damage from road debris.
110 Wiring Diagram for a Cargo Trailer
Below is a wiring diagram that shows how to wire a cargo trailer. This diagram is based on a cargo trailer with a 110V power supply for appliances and charging a battery.
| Wire Color | Function | Circuit |
|---|---|---|
| White | Ground | N/A |
| Yellow | Left Turn/Brake Light | C1 |
| Green | Right Turn/Brake Light | C2 |
| Brown | Tail Lights/Marker Lights/Clearance Lights | C3 |
| Blue | Electric brakes | C4 |
| Red | Battery Charge/Power | C5 |
Circuit 1 – Left Turn/Brake Light
The left turn/brake light circuit is connected to the yellow wire. This wire is connected to the left turn/brake light on the trailer.
Circuit 2 – Right Turn/Brake Light
The right turn/brake light circuit is connected to the green wire. This wire is connected to the right turn/brake light on the trailer.
Circuit 3 – Tail Lights/Marker Lights/Clearance Lights
The tail lights/marker lights/clearance lights circuit is connected to the brown wire. This wire is connected to all of the tail lights, marker lights, and clearance lights on the trailer.
Circuit 4 – Electric Brakes
The electric brake circuit is connected to the blue wire. This wire is connected to the electric brake controller in the towing vehicle. This circuit is only used if the trailer has electric brakes.
Circuit 5 – Battery Charge/Power
The battery charge/power circuit is connected to the red wire. This wire is connected to the battery in the trailer. It is used to charge the battery and power the electrical systems in the trailer.
FAQs
1. What gauge wire should I use for the trailer wiring?
The gauge of wire to use depends on the length of the wire and the circuit amperage. Generally, a 14-gauge wire is sufficient for most circuits.
2. Can I use a car battery in my cargo trailer?
No, you should use a deep cycle battery in your cargo trailer. A car battery is not suitable because it is not designed for long-term power use.
3. What size fuse should I use for each circuit?
The size of the fuse depends on the amperage of the circuit. Generally, a 15-amp fuse is sufficient for most circuits.
4. Can I use the trailer battery to power appliances in the trailer?
Yes, the trailer battery can be used to power appliances in the trailer. However, you should ensure that the battery is fully charged before using it to power appliances.
5. How do I know if my trailer wiring is working properly?
You can use a circuit tester to test each circuit in the trailer wiring. If a circuit is not working, you can use the wiring diagram to troubleshoot the problem.
6. Can I hire a professional to wire my cargo trailer?
Yes, if you are not comfortable wiring your cargo trailer, you can hire a professional to do the job for you. A professional will ensure that your trailer is wired correctly and safely.
Conclusion
Wiring a cargo trailer is an important task that should be done correctly to avoid electrical problems and ensure safe traveling. With the help of this article, you should be able to wire your cargo trailer properly using the wiring diagram provided. Remember to follow wiring regulations and pay attention to the details to keep yourself and others safe when using the trailer.
