Other permutations of connectors may be adaptable with off-the-shelf parts. The Law: By law, trailer lighting must be connected into the tow vehicle's wiring system to provide trailer running lights, turn signals and brake lights. Trim off the access wire and casing, remove the wire from the casing and then use the casing for the opposite side. When it does, you know what wire it is. See tips for vehicles which may have a five wire tail light system. Connect this wire to the brown wire of the quick connector.
These additional wires allow a for to be installed and a connection between the vehicle's power supply and a 12-volt battery for a or an additional auxiliary power source. Your trailer-rental place, and most auto parts stores, sell simple electronic adapters that will combine the brake-lamp and turn-signal functions. The wire is in plastic tubing and splits off to the left and right taillights. Strip the wires, solder the connection and add shrink tube. Perhaps you want to add clearance lights, extended the plug length at the tongues end, change out the lights or whatever else may need more wires. You can see the wire is fully cased in poly split loop, have a sufficient amount of loops to hold the wiring in place and prevent it from hanging down.
Position Your Wiring If possible, feed the wires through the hollow opening of your trailer frame in the front where the trailer attaches to the ball hitch on your vehicle. This is why some connectors have as many as seven pins, to make provisions for the multiple circuits. The installation should take less than one hour. Hence the need for wiring your vehicle. A breakaway switch uses either a large dry cell battery or the auxiliary 12-volt battery contained within the trailer to automatically engage the trailer brakes if the trailer is accidentally detached from the tow vehicle. So, if you are a do-it-yourself wire person, please ask us for advice before doing your own wiring. Some 12 volt batteries produce up to 14 volts on full charge.
The colors used in the color code are yellow, white, brown, and green. Cut the white wire short enough for attachment to the front of the trailer near the connector plug. But not until you hook up the lights on the trailer. The trailer lighting system must not be directly spliced into your tow vehicle lighting system. I used adhesive filled shrink tube as well for a waterproof seal. The most common wire thickness for a trailer is 16 gauge, but I bought thicker wiring for added durability.
The white wire is your ground wire, which must be cut short and attached to the front of your trailer frame with a screw to power your lights. On my truck, not only was the trailer wiring bad, but the wiring on my truck was out too. Required for some vehicles to avoid vehicle light circuit damage. Trailer electrical connectors come in a variety of shapes and sizes. If you're towing just for the day and don't ever plan to tow again, you can pick up some adapters that replace the taillight bulbs in your vehicle and have pigtailed wires hanging from them.
It installs in the harness just before the trailer connector. If it is dirty, corroded or faulty in another manner, clean it and reconnect it. Choose a connector that has the required number of pins for the functions required. Identify which circuit is the blinker, and repeat for the right turn signal. Splice into this wire and bring it to the vehicle side of the trailer connector.
The white wire is usually very short in length. The trailer wiring diagrams listed below, should help identify any wiring issues you may have with your trailer. Drill a small pilot hole into the frame and attach your ground wire with a stainless steel screw. Connectors: Various styles of connectors are available with four to seven pins to allow transfer of power for the lighting as well as auxiliary functions such as electric trailer brake control, backup lights etc. If you try to wire them in parallel with the customary pair of running lamps, you may overload the vehicle's headlamp switch--so you'll need to add a relay to handle the extra current. It will help to have an understanding of trailer light systems and we recommend reviewing before starting this project. As you can see on the back of the package, they typically provide a guide so if you need extra help, this is a great reference guide.
When the taillights and brake lights are used at the same time, it creates the maximum amp load of the lights on the trailer. Stay up to date with my latest tutorials, don't forget to my profile and be sure to check out my page as well for all your needs. The second, which is the most common problem, is a weak ground in the system. Tail Light Converters Taillight Converters are used when the tow vehicle has separate wires for turn signals and brake lights 3 wire system. But wiring a trailer may not be easy.
Crimp the connection and melt the heat shrink tube with a heat gun. Your hitch installer can determine your wiring needs based on the type of trailer you are towing as well as what kind of tow vehicle you have. The additional wire is tapped into the backup lights to disengage the hydraulic trailer coupler actuator when the vehicle is reversing, thus turning off the trailer's brakes. Surge brakes are an independent system activated by a master cylinder at the junction of the hitch and trailer tongue. All trailer wiring and the tow vehicle connector should be checked and tested. Some of the lights were out, but the light bulbs were fine.
Repeat the same process in the back of the trailer, connecting the remaining brown wire to the brown wiring coming from the rear lights. Calculate the amp load your trailer is pulling, see below. . This project requires a trailer lighting kit that includes a wiring harness, small connection clips, a couple rear turn signals and a couple side mounted lights. Attach the Ground Wire to the Trailer The white wire must be attached to the trailer in order to ground and power the lights. If the lights have gone out on your trailer, it is time to redo the wiring.