Question about 2002 Chevrolet Silverado 2500HD

1 Answer

I have a 2002 2500HD pick up with a Stahl utility body. The stock tail lights are no longer available, so I bought Grote RV tail lights 3-module 4- function with 5 wires. The problem is the stock lights have 8 wires. What do I do ? I can't get the brake lights to work.

Posted by on

  • 6 more comments 
  • Dan Flood May 29, 2011

    The model is Monarch 5134. Thanks

  • Dan Flood May 29, 2011

    From left to right: 1157 double filament 1-red wire, 1- brown wire
    1156 single filament 1- black wire ( back -up lens)
    1156 single filament 1-green wire, 1-brown wire
    All three cans are strapped together in the back, from which a single white wire is attached.

  • Dan Flood May 29, 2011

    I was incorrect about the number of wires in the stock harness. It has 7 wires, the 8th goes to the tag light, Thanks

  • Dan Flood May 29, 2011

    You are correct, the inside lens on the assembly should have an 1157 , I checked the other
    assembly and it has the correct bulb. Thanks

  • Dan Flood May 29, 2011

    what about the red wires? This truck has no trailer plug, also there is no yellow on the lens side

  • Dan Flood May 29, 2011

    OK TRUCK side- both are the same- green, yellow, light blue, dark blue, red, brown, black.

    LENS side- left to right, both the same-L-red/ brown, C- black, R- green/ brown,
    white ground

  • Dan Flood May 29, 2011

    Everything was correct except the yellow wire goes to ground on both sides and dark blue is
    turn signal on both sides. Thanks for your help. You're the one.

  • Dan Flood May 29, 2011

    Jturcotte was extremely knowledgable and stuck with me until I could get the problem solved. Fixya is great. Thanks, Dan Flood

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  • Chevrolet Master
  • 8,732 Answers

Hi, your truck requires separate filaments for the brake lights. I don't know if these filaments are available in the Grote lights you bought. Do you have the model number or specs for the Grote lights?

I have a 2002 2500HD - jturcotte_1780.gif

Posted on May 29, 2011

  • 8 more comments 
  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    Thanks. I cannot find the details on this model, but I see a picture with 3 lenses. Is this what you have on each side? With 3 lenses, you should be able to accommodate lots of filaments, though the configuration you have may not have all of the filaments you need for your particular truck. If you cannot return these for a set with more wires, I believe you can easily modify these to work. Can you tell me how many bulbs are in each assembly and how many filaments in each bulb? You might have to unscrew the lenses to check. What I'm thinking is if the inside lens has one bulb with a single filament, you could switch the socket to a double filament to accommodate the brake lights. If that one already has a double filament, then check the outside lens.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    If you can also tell me the color of each wire going to each lens, I can provide a wiring diagram. If there are enough filaments already in the assembly, the modification could be even easier than I previously described.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    OK, there is something I don't understand. The inside lens has 2 wires but only one filament. I wonder if it has the wrong bulb installed. When you take the bulb out, are there 2 contacts in the bottom of the socket? Also, would you mind checking the other assembly to see if it is the same? If that is actually a double filament socket, we have an easy fix. Replace the inside bulbs with 1157s. All of the colors make sense, including using the red wire for brakes, as long as we can use the green wire for turn signal and still have tail lights on the brown wire. I'm assuming you had to use the red wire to get the turn signal to work. With only one high watt filament, you would have to choose between brakes and signals.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    OK, and that one has yellow and brown wires, right? So you can use the red wires for brakes. green and yellow for signals, brown for tail, black for backup, and white is ground. Are you able to read that diagram to see which colors from the truck you need to connect?

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    function on the truck on the lens
    ground black white
    backup green black
    left turn light blue yellow
    left tail brown brown (connect both browns on lens to brown on truck)
    right tail brown/white brown (connect both browns on lens to brown/white on truck)
    right turn light blue green

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    Sorry, there are 2 light blue wires on each side. One is for brakes and one for signals. Not sure why they did that. You will need to test them to see which is which. You may want to put your brakes on the inside lenses and reserve the outside lenses for the signals. Am I making sense?

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    checked supplemental diagrams that show yellow and green wires on the truck for turns, but these may be for the trailer plug--not sure. If you have only one light blue on each side, that is for brakes. Use the yellow and green for turns, if you have these colors on the truck.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    OK, sorry. In order for me to get this right once and for all, can you run down the wire colors on the other lens like you did on the first one? Also, can you name all the wire colors on the truck, both sides. Sorry, I want to get this right. There are too many diagrams I'm looking at, and not sure which one matches your truck. Then I can make up a table for your connections.

  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    Unfortunately these truck colors do not match any of the diagrams I have for a 2002 2500HD. Were all of these wires connected? If not, it may be some of these are for the optional trailer plug. So I had to guess on the turn wire colors. Can you hook this up temporarily--maybe with wire nuts--until we're sure I have it right? I assume you're going to solder or use crimp connector for the final installation. Once you have it hooked up, please test and tell me what you see. The turn lamps should be on the outside and should be brighter than the tail lamps. The brake lights should be on the inside and should also be brighter than the tail lights. The backup lights should work. Sorry this is a bit painful.




  • Jeffrey Turcotte
    Jeffrey Turcotte May 29, 2011

    sorry, the right side of the table was clipped...


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

Plug Types/Application
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Columns are: Color, Function, Mark on the plug.

Seven wire Trailer plugs:

Horse, stock or utility trailers:

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Brown = Tail and clearance lights - 3
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Yellow = Left turn/Brake - 5
Green = Right turn Brake - 6
Orange or Purple (not both) = Auxilliary or Reverse - 7

Recreational Vehicle:
White = Ground - 1
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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
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Brown = Tail and clearance lights - TM
Red or Black (not both) = Battery2_bing.gif, aux power - A
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Recreational Vehicle: (color, use, plug mark)
White = Ground - GD
Brown = Right turn Brake - RT
Green = Tail and clearance lights -TM
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Red = Left turn/Brake - LT
Blue = Electric Brakes - S


Four wire plugs:
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A test light and a 12VDC power source can be handy for trouble shooting.
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How to wire a towbar to a renault laguna ? what


Hi there,

If you have the Renault end, I've got the rest. I have the pinouts for 7 wire, 6 Wire and 4 Wire, One of them will fit the bill

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:

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 = Electric2_bing.gif 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
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Recreational Vehicle: (color, use, plug mark)
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Green = Tail and clearance lights -TM
Black = Battery, aux power - A
Red = Left turn/Brake - LT
Blue = Electric Brakes - S


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Yellow = Left turn/Brake
Green = Right turn Brake
Brown = Tail and clearance lights


Ground should be 10ga.
Others 14 ga

A test light and a 12VDC power source can be handy for trouble shooting
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Best regards
Mike cf3f8fc.gif

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Wiring towbar for t25 volkswagen


Hi Paul,

This should help,

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Columns are Color, Function, Mark on the plug.

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Green = Right turn Brake - 6
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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
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Six wire trailer plugs:

Horse, stock or utility trailers:
White = Ground - GD
Yellow = Left turn/Brake -LT
Green = Right turn Brake -RT
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Red or Black (not both) = Battery, aux power - A
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Recreational Vehicle: (color, use, plug mark)
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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


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Green = Right turn Brake
Brown = Tail and clearance lights


Ground should be 10ga.
Others 14 ga

Best regards
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For those of you that need to wire up a trailer or have to 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.

Plug Types/Application
7 Way - RV Trailers, Horse and Utility Trailers
6 Way - Horse, Stock and Utility
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Columns are: Color, Function, Mark on the plug.

Seven wire Trailer plugs:

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:
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Black = Battery, aux power - 4
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Six wire trailer plugs:

Horse, stock or utility trailers:
White = Ground - GD
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Recreational Vehicle: (color, use, plug mark)
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Red = Left turn/Brake - LT
Blue = Electric Brakes - S


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Green = Right turn Brake
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Others 14 ga

A test light and a 12VDC power source can be handy for trouble shooting.
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For those of you that need to wire up a trailer or have to occasionally borrow trailers and look at the wiring plugs with disdain (I mean face it they don't make sense, grd is white, +12vdc is black, etc), this is for you.

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:

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
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
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A test light and a 12VDC power source can be handy for trouble shooting.
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Hello all,

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

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:

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
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

A test light and a 12VDC power source can be handy for trouble shooting.
Best regards
Mike

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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, grd is white, +12vdc is black, etc), this is for you.

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:

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
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

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Trailer Wiring Cheat Sheet


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, grd is white, +12vdc is black, etc), this is for you.

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:

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

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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

Tip

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, grd is white, +12vdc is black, etc), this is for you.

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
:

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 | 1981 Ford F 150

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