I want to use a 7 prong connector in a four wire trailer connection. I always have to rewire my trailer mid winter when I use the four wire flat connection. I am using a standard wire harness on my 90 Chevy truck to get the four wires from the truck to the 7 prong connector for the trailer. I have connected it with the pattern provided by the connector instructions. I figured white to white, brown to brown, yellow to yellow and green to green, would give me the same connection as a four wire connection and have the strength of the seven wire connectors.
I don't get the running lights to work , and they did before. The right turn also blinks the left turn when the lights are on. I have good grounds from the truck side of the trailer wiring harness and on the trailer side as well.
My question is, does the 7 wire connector have some internal connections between the prongs or are these just straight wire to wire connections?
And should the trailer be hooked up while I am doing this rework?
