Checking 7-Way and 6-Way Connector for Proper Wiring
Question:
Purchased a 1991 F-250 that has a 7 round flat at receiver that does not convert with 4 pin adapter. It also has a 6 round round pin inthe bed for gooseneck that seems to be wired the same-but not standard. Is there an old common different pattern?
asked by: Brian
Expert Reply:
The method of wiring a 7-way blade-type trailer connector is standardized. I would recommend using a circuit tester, such as part # PTW2993 on the 7-way to ensure that it has been wired correctly. Test each pin as its function is activated. If you were to look at the front of the connector and compare the pins to the face of a clock, the 12-volt accessory pin would be at the 1-position, the right turn in the 3-position, the brake controller output at 5, ground at 7, left turn at 9, and running lights at 11. The center pin is typically used for the reverse light circuit, but if your trailer does not have reverse lights, it can be used for other purposes if you wish.
Once you have determined that the connector has been properly wired, plug in the adapter. Use your tester to test the output from the adapter, the male pin is for the ground connection, the next female socket is the running lights, followed by the left directional/brake and the right directional/brake.
The 6-way connector in the bed should be wired as follows. Starting at the top and working clockwise, the top pin is for the running lights, followed by the ground, left directional/brake, right directional/brake, and brake output. The center pin is usually used for the 12-volt accessory circuit.
Keep in mind that there are two accepted methods of wiring a 6-way connector. One uses the center pin for the 12-volt accessory circuit, the other uses the center pin for the brake output. If you are planning on using the connector in the bed of your truck, you will want to ensure that you have it wired the same way as the trailer.
