The red and blue wire can be used for brake control or auxiliary. I recommend adding a 7 way molded trailer wire connector like part h20046 and a junction box like part 38656.
Trailer Wiring Diagrams Etrailer Com
6 wire to 7 wire trailer plug diagram. What systems are required by law for your trailer depends on where you live. How to install 7 way metal trailer connector and wiring harness for a 1999 jeep wrangler. 34 inch by 1 inch 6 way rectangle connectors right turn signal green left turn signal yellow taillight brown ground white. If your truck has a built in 7 pin socket but you only need 5 of the pins. You can certainly add a 7 way trailer connector to your trailer with 6 wires. Use the 7 pin connector anyway see below and just leave out the last 2 wires.
Trailer electrical connectors come in a variety of shapes and sizes. 6 way system rectangle plug. 7 way wiring diagram for colors yellow white red green blue brown and black. Wiring in bed trailer wiring 12 volt power to a switched ignition source on a 2004 chevy silverado. By law trailer lighting must be connected into the tow vehicles wiring system to provide trailer running lights turn signals and brake lights. If can you open up the existing 6 way connector on your trailer take the housing apart and look at the terminals the wires attach to.
You would simply have 1 pin on the 7 way connector that did not function. The basic purpose remains the same whether your truck and trailer is using a 4 way 5 way 6 way or 7 way connector. 7 way wiring diagram to use when installing new 7 way plug coiled flex umbilical cable to join 7 way on rv to 6 way on flat towed vehicle troubleshooting trailer brakes and brake and turn lights not functioning with 7 to 6 way adpater. These state laws. Plug wiring diagram load trail llc for 6 wire trailer plug diagram image size 485 x 351 px and to view image details please click the image. Many different harness types are used to connect tow vehicles power sources to the electrical wiring on trailers.
If you look at the trailer wiring faq article i have linked you to you can see some diagrams showing the proper way to wire a vehicle and trailer side 7 way trailer connector. 7 way plug wiring diagram standard wiring post purpose wire color tm park light green battery feed black rt right turnbrake light brown lt left turnbrake light red s trailer electric brakes blue gd ground white a accessory yellow this is the most common standard wiring scheme for rv plugs and the one used by major auto manufacturers today. In the trailer wiring diagram and connector application chart below use the first 5 pins and ignore the rest. Use on a small motorcycle trailer snowmobile trailer or utility trailer. The difference between a 6 pin system and a 7 pin is that the 7 pin has a connection for backup lights. Here is a picture gallery about 6 wire trailer plug diagram complete with the description of the image please find the image you need.
Wiring a 7 way trailer connector if existing wire colors dont match.