trailer wiring 04 sport.

Actually, that is an optical illusion, there are four pins that are all the same size. That connector is commonly called a four pin flat connector. The three pins that are protected on the vehicle are all power to the trailer lights, the exposed pin is the ground. Of the three pins, 1 goes to the running lights on both sides, 1 goes to the brake/turn on one side, and the last one goes to the brake/turn on the other side. All lamps on the trailer use a common ground.

Bill, he has the 4-pin flat connector, there is no cover. At least there is no diagram on the cover.

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L.W. ("ßill") Hughes III did pass the time by typing:

Actually, I have two late model Ford trucks in my driveway that came with factory installed round AND flat connectors side by side. I guess that way us Mickey Mouse types can have our choice....

Actually, on a vehicle this small, the flat connector is the most likely to be used because that is what will be found most commonly on a trailer it is capable of pulling.

The larger trucks will get the 6- or 7-pin type that can accomodate trailer brakes and the like, but the flat 4-pin is strictly for lighting. The round

PS I recently bought my daughter a 2002 Tacoma that has the flat connector from the factory, and we looked at Ford F150s that also had flat connectors from the factory. The point is that manufacturers do indeed use the flat 4-pin connectors where appropriate. Of course, they will not limit their options to only this kind of connector, but they will use them where appropriate.

Please don't try to tell me what "I" did. You're flat out wrong and that is all there is to it. I bought both trucks brand new and they came straight from the dealer that way. One round plug, one flat plug, side by side on the same bracket. Factory installed, end of story.

I was sitting at a traffic light waiting to get on the freeway this morning, and the Ford Expedition in front of me clearly had two trailer connectors on the back that looked like factory equipment. It had a cover on each, but one was a flat 4-pin and the other looked to be either 6 or 7 pin round. No question it was round, but the cover hid the pins, and I am not familiar with them enough to remember the relative size of each.

Sorry, Bill. Factory fitment on Fords is a flat 4-pin on the smaller trucks with a Class II hitch, and a flat 4-pin plus a round 6- o6 7-pin for the Class III hitch. I don't know how long this has been the case, I was suprised to find it a couple of years ago when I wanted a new truck. I was prepared to install my own trailer light connector, but found that Fords came with them from the factory. I am not prepared to say that every Ford Truck comes wired for trailer lights, but the ones that come with a factory trailer hitch are certainly wired, and the wires they get are dependent upon the class of hitch. Class II gets the flat connector, and I saw a Class III hitch this morning that had both a flat and a round connector.

Yes. And with a Class II hitch, all that is needed is lighting, and the flat connector is prefect for that application.

No, I have seen the dual systems on new vehicles too Bill, he is right, they make them universal all in one bracket.

Mike

"L.W.(ßill) Hughes III" wrote: