Question about 1989 Ford F 350

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Wiring need wiring diagram 4 trailer 7 wire have O.E.M. plugs

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  • GCBUTT Jun 20, 2008

    I HAVE TRIED TO INSTALL AN ACCESSORY POWER SUPPLY (CIGARETTE LIGHTER) OUTLET FOR MY MOTORHOME.I TOOK THE POWER SUPPLY FROM ONE OF THE LIGHTS AT THE BACK OF THE HOME.I INADVERTENTALLY CROSSED MY WIRES AND HAVE BLOWN THE CIRCUT.I HAVE NOW LOST THE POWER TO 5 OF THE LIGHTS.DO YOU KNOW IF THERE IS AN INLINE FUSE OR A FUSE BOX SOMEWHERE THAT I CAN MAKE THE REPAIR?SEND REPLY TO EMAIL. THANK YOU.

  • Anonymous Jul 23, 2008

    need to color code for the wiring of trailer

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Try this link www.dodgeram.org/tech/mods/electric/trailer_wire.htm

Posted on Jul 10, 2009

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Need a schematic that shows what eachof the colors of wires should be connected to on a 7 blade RV plug in receptacle.


7-Way RV Trailer Connector Wiring Diagramqu363_250.jpg
Click to Enlargequ363_2_250.jpg
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Question:
trailer connector wireing diagram. need to know which color wire go to which post.
asked by: Joann

Expert Reply:
When wiring a trailer connector, it is best to wire by function, as wire colors can vary. We have an excellent wiring diagram on our website, I will provide you a link so you can look at it.

If you are looking at the inside of the trailer connector where the wires mount to the terminals starting at the notch at the top and working clockwise:

1:00 is Black and 12 volt power
3:00 is Green and Right Turn and Brake
5:00 is Blue and Brake Controller
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9:00 is Yellow and Left Turn and Brake
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Center is Purple and is Optional Reverse

I recommend using a circuit tester like part # 40376 to verify your connections.

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Hello Carol, The 7 way is for use with a brake controller and/or a trailer that has electric brakes. The 4 way flat is a basic trailer plug connector.
Connect as follows:
Green wire- Connects to the vehicles right turn wire harness & provides brake light and right turn signal on trailer.

Yellow wire- Connects to vehicles left turn wire & powers brake light & Left turn signal on trailer

White wire- Ground

Brown Wire- Tail/ marker/ license plate lights

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mr_brokrench_4.jpg

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Wiring diagram


If you are going from a 4 pin on your trailer to the 7 pin on the truck. You need to go to parts store or a department store (ex Wal Mart) and look in trailer section and find the adapter. Thats what I did. Also Remember if your lights don't work on trailer, check the plug to make sure its tight or check the fuse under your drivers side rear seat for that fuse box.

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Here's one
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Here is the wiring diagram for the trailer wiring for your truck.
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Farrout!

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