i want to rewire my trailer harness on my truck. i have a 6 wire roung plug but i wat a 7 wire plug. what is the 7 wires for?
1. left turn sig., 2 right turn sig., 3 brake lights. 4 tail lights. 5 ground. 67 electric brake. This is my best guess. But I would buy a shop manual. they pay for themselves.
Don't know where the hell you got a SIX wire plug from? Standard plugs are usually 5 or 7 pin. However, to answer your question, providing that you use the same color codes as we do, yellow is for the left turn signal, green the right. White is the earth, red for brake lights, brown for tail lights, and black for reversing lights (if fitted). That leaves the blue one as a spare which can be used to power an interior/ exterior work light on the trailer. In Australia and NZ we only have the 5 or 7 pin plugs. They are made by either HELLA or NARVA and each companies male/female plugs are compatible with each other. Google either company and see what is available. Hope this helps. P.S. For the cost of a return airfare and cigarettes, I am willing to come over and wire your truck and trailer for you AND I'll bring a set of plugs for free.
Prepare for accurate and confusing information. The center pin on a 7 pin plug is generally used for backup lights (black wire) if you have them wired in. Being that you have a 6 pin plug you probably don't so you will disregard the center pole. This is the order of color starting from the ground pole (white wire). The ground pole should be the one next to the slot in the body of the plug that lines it up with the plug housing when you put it all together. White (ground), Yellow (L turn), Brown (tail lights), Red (battery charge wire), Green (R turn), Blue (trailer brakes). If you don't have trailer brakes, disregard that pole. The brake lights work through the turn signals, if they are wired separately, it is wrong. Starting at the ground pole next to the slot in the plug, the order of colors goes around the plug in the direction away from the slot, you will end with the blue wire on the other side of the slot next to the white wire. It's very confusing to explain and when you read the colors on the plug compared to what I have told you, you will definately scratch your head. This is the (U.S.) national standard for all trailer wiring, unfortunalely, not all manufacturers adhere to this thus causing confusion for people such as yourself. I cannot even begin to guess how many trailers I have wired and how many tow packages I have installed on cars and trucks. I wish there was an easier way to explain it but the only other option is a diagram which answers does not support. Worse comes to worse and you don't like any of the other answers you get, e-mail me and I will mail you a diagram or maybe even a picture if I can come up with one.
