Trailer wiring can be a complex and intimidating process. This article aims to simplify the process for 1999 Dodge Ram owners by providing a detailed trailer wiring diagram along with step-by-step instructions. Whether you are an experienced mechanic or a DIY enthusiast, this guide will help you understand the wiring system of your Dodge Ram and get your trailer up and running in no time.
Why Is Wiring a Trailer Important?
Wiring a trailer is crucial to ensure the safety of the vehicle and the cargo you are carrying. A properly wired trailer will have functioning turn signals, brake lights, and running lights. Without these important features, you will not be able to signal when turning or braking, which could lead to accidents or citations.
In addition, many states have laws that require trailers to have functioning lights. If you plan on towing your trailer on public roads, you need to make sure your wiring is up to code.
Parts Required for Trailer Wiring
Before we dive into the wiring diagram, let’s take a look at the parts required for trailer wiring on a 1999 Dodge Ram:
| Connector | Trailer wire | Crimping tool | Tape | Wire cutter |
Make sure you have all the necessary parts before starting the wiring process. You can purchase a trailer wiring kit that includes all the necessary parts or buy them separately.
Trailer Wiring Diagram for 1999 Dodge Ram
The following diagram shows the wiring setup for a 1999 Dodge Ram trailer:
| Connector Type | Color | Function |
| 7-Way RV Blade | Black | 12V Power |
| 7-Way RV Blade | White | Ground |
| 7-Way RV Blade | Blue | Electric Brakes |
| 7-Way RV Blade | Green | Tail/Running Lights |
| 7-Way RV Blade | Yellow | Left Turn/Brake Lights |
| 7-Way RV Blade | Red | Stop/Turn Lights |
| 7-Way RV Blade | Brown | Right Turn/Brake Lights |
The next sections will walk you through the process of wiring your trailer based on this diagram.
Step-by-Step Guide to Wiring Your Trailer
Step 1 – Prepare the Connector
The first step is to prepare your connector by stripping the wires and crimping the connectors. Start by stripping the insulation off the ends of the wires, leaving about 3/8 inch of exposed wire.
Next, crimp the connectors onto the wires using a crimping tool. Make sure you attach the correct connector to each wire based on the wiring diagram. If you are unsure which connector is which, refer to the wiring diagram or the instructions that come with your wiring kit.
Step 2 – Mount the Connector
Once your connector is ready, mount it onto your truck. The most common location for the connector is the bumper or hitch area. Use the screws or bolts that come with the kit to secure the connector in place.
Step 3 – Connect the Wires
The next step is to connect the wires from your trailer to the corresponding wires on your truck. Connect the white wire to the ground terminal, the black wire to the 12V power terminal, the blue wire to the electric brakes terminal, the green wire to the tail/running lights terminal, the yellow wire to the left turn/brake lights terminal, the red wire to the stop/turn lights terminal, and the brown wire to the right turn/brake lights terminal.
Make sure you connect the wires securely and tightly. You can use electrical tape to wrap the connections and prevent them from coming apart.
FAQ
1. Can I use a 4-way connector instead of a 7-way connector?
If your trailer has less than four lights (i.e. no electric brakes), you can use a 4-way connector instead of a 7-way connector. However, if your trailer has electric brakes, you need a 7-way connector.
2. Do I need to use a wiring kit or can I buy the parts separately?
You can buy the parts separately if you prefer, but it is easier and more convenient to use a wiring kit. Wiring kits come with all the necessary parts and instructions, making the process much simpler.
3. What is the difference between running lights and brake lights?
Running lights are the lights on the trailer that are always on when the truck’s headlights are on. Brake lights are the lights that come on when you apply the brakes.
4. What if my trailer has more than one set of brake lights?
If your trailer has more than one set of brake lights, you need to connect them in parallel. This means you connect each set of brake lights to the same wire on your trailer.
5. What if my trailer has only one brake light?
If your trailer has only one brake light, you can connect it to either the left turn/brake lights terminal or the right turn/brake lights terminal. It doesn’t matter which one you choose, as long as you connect it securely.
Conclusion
Wiring your trailer can be a daunting task, but with the right tools and instructions, it doesn’t have to be. This article has provided you with a detailed wiring diagram and step-by-step instructions for 1999 Dodge Ram trailer wiring. By following these instructions, you can ensure the safety of your vehicle and cargo and comply with state laws.
