Question about 2004 GMC Sierra 2500

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Diagram i would like a picturer of the 7 wire trailer plug with wire color codes on it thanks Randy

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  • MattdaTester Nov 02, 2008

    need the 7 way color code diagram anyone able to help me?

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Posted on May 22, 2008

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2014 triton mn. How can I connect 7-pin trailer socket into existing wiring harness?


the simplest way to do this is to go to a tow bar installer shop and buy the harness ( around $25.00 aud)
it is a simple action of pulling a harness plug apart and inserting a piggy back plug in the connection
the wires for the trailer are properly installed and all you have to do is wire the plug connection according to the wiring diagram that came with the plug

Feb 10, 2016 | Cars & Trucks

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Trailer Wiring Standards (Color Codes/Plug Marks)


Hello all,

For those of you that have or occasionally borrow trailers and look at the wiring plugs with disdain (I mean face it they don't make sense, ground is white, +12vdc is black, etc), this is for you.

This will show you how to wire trailers with seven, six and four pin connectors

Plug Types/Application
7 Way - RV Trailers, Horse and Utility Trailers
6 Way - Horse, Stock and Utility
4 Way - Utility Trailers

Columns are: Color, Function, Mark on the plug.

Seven wire Trailer plugs (Large trailers with a battery and electric brakes):

Horse, stock or utility trailers:

White = Ground - 1
Blue = Electric Brakes - 2
Brown = Tail and clearance lights - 3
Black = Battery, aux power - 4
Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7

Recreational Vehicle:
White = Ground - 1
Blue = Electric Brakes - 2
Green = Tail and clearance lights - 3
Black = Battery, aux power - 4
Red = Left turn/Brake - 5
Brown = Right turn Brake - 6
Yellow = Auxilliary or Reverse - 7


Six wire trailer plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery, aux power - A
Blue = Electric Brakes - S

Recreational Vehicle: (color, use, plug mark)
White = Ground - GD
Yellow = Not used -
Brown = Right turn Brake - RT
Green = Tail and clearance lights -TM
Black = Battery, aux power - A
Red = Left turn/Brake - LT
Blue = Electric Brakes - S


Four wire plugs:
White = Ground
Yellow = Left turn/Brake
Green = Right turn Brake
Brown = Tail and clearance lights


Ground should be 10ga.
Others 14 ga

Best regards
Mike

on Sep 09, 2009 | 2004 Dodge Ram 2500

1 Answer

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
Click to Enlarge
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
7:00 is White and Ground
9:00 is Yellow and Left Turn and Brake
11:00 is Brown and Tail and Running Lights
Center is Purple and is Optional Reverse

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

Sep 12, 2013 | 2005 Dodge Ram 2500 Truck

1 Answer

How do I attach trailer lights to a 2004 Toyota Solara? Need pictures or video if possible.


Test the wires on the car and ID each ones function, brake light, tail light and so on, hook up to the correct wire on the trailer harness which does have a wiring diagram.

Aug 28, 2012 | Cars & Trucks

2 Answers

I need a wiring diagram for a 7 wire system


I am guessing you mean the 7 pin trailer tow adapter.

the 7 pin RV plug itself

714b06a.jpg

The 2005 trailer tow adapter wire diagrams
c4212a8.jpg

4d132ab.jpg

Oct 23, 2010 | 2004 Ford F150

1 Answer

Looking for the diagram for the trailer plug


check out this link, it should be helpful, has a color code for GMC and other vehicles. Let me know if you need more help or info. Good luck!
http://www.etrailer.com/faq-wiring.aspx

Jul 22, 2009 | 2004 GMC Yukon

1 Answer

Looking for color code (diagram) - 7 wire trailer harness/wiring


If you haven't purchased the plugs yet. The wire color codes should be included in the package.
  • If you are using used plugs ck the back of the plugs for color or function of wire
  • Wht - ground
  • red - stop
  • blue - accessory/aux
  • brown - tail
  • black - Marker
  • grn - left turn
  • yellow - right turn

May 06, 2009 | 2003 Chevrolet Silverado 2500HD

1 Answer

Installing a 7-pin trailer towing recptical on a 1991 Ford F150.


I believe you can look up the manufacturer of the trailer plug kit and find the wiring diagram there. On alot of the trailer plug kits, they have pics and diagrams in the package. The 7 pin plug (truck side) is available with the pig tail set up that plugs directly into the wiring harness for the lights. Then all you would have to worry about is the 2 wires for the electric brakes.

Nov 29, 2008 | 1991 Ford F150

1 Answer

Trailer wiring 7 way


dO NOT SPLICE WIRES.. You bought a 45000 dollar truck, spring for a wiring T --25 bucks.. ( plugs between main harness and Tail lights.. ) --Available at most good auto parts.. Painless wiring also has a kit.

If you did already cut or splice into your wires, take that **** loose.. Shrink wrap the dammage.. Silicone over srink wrap.. Wire will corrode.. if you did manage to get spliced wires to work,-- in a few years or sooner you will have issues with the connections..Can you say short circuit.. Moisture and loose connections are a thing of the past with sealed tap in wiring.. Plug and play..

If any of this is over your head, get a friend who knows, or a tech to help.. Don't jerry rig a 45,000 dollar new Truck.. Come ON..!!!!!

Sep 17, 2008 | 2008 Ford F-350

1 Answer

I need to wire a 7 pin plug for my trailer hitch...do u have a diagram or instructions that i could have?


Hi jonas,

Click here for a diagrams showing color codes and wire placement in a half dozen vehicle types.

Click here for diagrams on standard trailer plugs.

The second link is excellent.

Remember: Good things come to those who Rate

Mike

Aug 13, 2008 | 1987 Jeep Wrangler

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