This is the case with the 7-pin RV plug and the 7-pin utility plug. The only thing you have to watch out for is if the adapter or plug makers switch colors on you. It is a fairly simple system to understand and when you are making connections, you just need to line up the different colored wires in the same order and you should be fine. This wire operates the brake controller output. Then the yellow wire should power the left brake light and turn signal. The green wire goes to the right brake light and turn signal. The black is the power or hot wire and the white-colored wire is for ground This wire powers the tail or parking lights.
#7 pin trailer wiring diagram code#
What is The Color Code For Trailer Wires? Of course, this positioning depends on how you hold the plug and is used to add a little clarity to the topic. At least on one of the wiring diagrams, we will link to later on. They tend to be mixed up a bit with the #3 and 4 pin at 1 and 11 o’clock respectively the #1 & 2 pins at 5 & 7 o’clock respectively and the #5 & 6 pins at 3 and 9 o’clock respectively. Keep in mind that the pins do not go in numerical order (1,2,3, 4,5,6, 7). The positioning may not always be clear but it should be the pin at 11 o’clock on the plug.
The chart given above shows that the black wire is the #4 pin and it is for the 12-volt power supply. The 7th isn't marked but is the center terminal What is The Black Wire on a 7-Pin Trailer Plug? The way the 7-pin is marked is as follows- 1 White = Ground This is okay if your state does not require that your trailer have back up lights. Usually, it is the trailer’s back up lights. The center pin is usually for the yellow wire but it is the AUX pin that could power just about anything. The 7-pin model has an extra pin that makes sure that the back up lights on your trailer turn on when you put your tow vehicle in reverse. But the only real problem that we have found is that you may not get all of your trailer functions, lights, etc., working.
If you are not sure, take a photo with your phone camera and show the clerk what you need. RV parts and accessory stores should have some type of supply of these adapters. The cost of these adapters will vary depending on where you are buying them. To find the right adapter, just go to your local hardware store, a big-box outlet that carries this part, or Amazon, etc., and buy the one that fits your 6 and 7-pin plugs. If your state has no problem with your trailer being without back up lights, then all you need is the right adapter to make the connection. If this is a problem or not depends on the laws in your state. What is The Difference Between a 6-Pin And 7-Pin Trailer Connector?Īccording to our research, the only difference between these two plugs is that the 6-pin model does not have a pin for the back up lights. If the power to the green wire lights up your right brake light and turn signal, then you know what that green wire does. To know what each pin or wire for your trailer powers, hook up a 12-volt battery and test each one at a time. This will help ease some problems when you find that something important is not getting any power. Also, before you make this connection, you should know all the functions of the pins on your trailer side. There is no connection for it to send signals to. The connection can be made, the only thing that should happen is that one pin on the 7-pin adapter will not work. These trailers are often towed by modern vehicles that were given 7-pin plugs. There are many trailers built years ago that only have a 6-pin plug. This is a possibility and it is probably done all the time.