What is the Wiring Color Code for a 4 Pole Flat

Question

Question:

What is the normal wiring color code to the corresponding terminals for a four flat?

asked by: Bob

0

Expert Reply:

Below I have posted a link to the trailer wiring page that has a color code chart on it.

Brown = taillights
Yellow = left turn/brake
Green = right turn/brake
White = ground wire

To confirm you have the correct connections you can use a circuit tester like the Quickee Tester, # 3808, and match the wiring from the vehicle with your 4 flat.

expert reply by: Robert G

0

Answer 1

There is not an industry standard layout for wiring the 4-Way round pin connector, but there is a layout that is most accepted. If you you are looking at the front side of the 4-Way round trailer side plug, the top left prong would be used for…

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Answer 2

On a 4-Way flat connector like the 4-Pole 60 Inch Long Vehicle End, #18002, that you have referenced, white is the ground wire. The brown wire is for the taillights/running lights. Yellow is for left turn signal and brakes. Green is for right turn…

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Answer 3

Looks like you have a round 4-way connector in the picture you submitted. The colors you mentioned aren't totally a match for standard colors but they are close. Normally the colors are: White - Ground Return Green - Right Turn and Brake…

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Answer 4

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way…

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Answer 5

Most of the time the 4-Way connector is wired as follows. Looking at the front of the socket on the vehicle side with the cover raised the top left pole is the yellow, left turn/brake pole, the top right pole is the right turn/brake pole, the bottom…

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Answer 6

Many times the issue with a dim light on one side or the other is caused by a poor ground connection. You will want to inspect all of the ground locations as well as the ground wires coming from each light. Check for loose connections or pinched or…

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Answer 7

There is no standard for wiring the 4-way round connector so you will have to use a circuit tester, part #PTW2993 if you need one, to test the wires and wire the connector according to the wiring of your existing connector. I have posted links to the…

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Answer 8

I do have a handy trailer wiring FAQ article that would be perfect for you. I have included a link to it. I have also included a picture that shows the typical wiring diagram of a 7-Way round pin trailer side connector. As you can see, the 7-way…

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Answer 9

You can convert your RV to separate turn signals and/or LED operation in a couple of ways, depending on how much wiring modification you care to do. Any of your existing lights can be converted to LED operation by swapping out the incandescent bulbs…

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Answer 10

There is not an industry standard wiring diagram for the 4-Way Round Car End, part #PK11410. You will need to use a circuit tester, part #PTW2993, to check which pins have which functions on your trailer, and then attach the corresponding wires to…

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Answer 11

The brake lights on a trailer are on separate circuits. There is one circuit for left turn and brake lights and another circuit for right turn and brake lights. If the turn signal is working on the left side but not the brake light, then it is most…

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Answer 12

If just the left side brake light isn't working on your trailer, I recommend checking the tail light assembly itself to make sure it is securely grounded. Depending on the style light you have, it may use a dedicated ground wire or simply ground…

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