Troubleshooting Wire Functions On Trailer With 6 Wires

Question

Question:

Trailer has six wires one yellow one brown one black one green one red one white

asked by: Carey L

0

Expert Reply:

With 6 wires on your trailer, we have a good idea what they go to, however you will want to test the functions. You can use a 12V battery and connect each wire individually on the positive terminal while the negative terminal is connected to ground. I've attached a wiring diagram to help you with functions and traditional colors, however many trailers will have colors that do not match function represented in this article so don't be thrown. That is more common than you think.

Traditionally the colors are:
Brown--tail/running lights
Green--right turn and brake
Yellow--left turn and brake
White--ground
Red or Black--battery 12V
Blue--brake controller output
Purple--backup

Since you have a black and red wire, those functions are most likely battery, brake, or backup. You can eliminate based on if the trailer doesn't have brakes, doesn't have a battery, or doesn't have a reverse light or reverse lockout. Most 6 way trailers do not have reverse. If you need a new connection for your trailer, I recommend # PK11604.

expert reply by: Jason S

0

James

11/5/2021

I have 6 wires coming from my trailer 1red 1black 1yellow 1green 1blue 1brown. Has always worked fine. Accidentally pulled wires out of pig going to truck. What diagram can you send me to get it right

Reply

Les D.

11/9/2021

I have linked you an excellent article that shows the wiring and pin-outs for all sorts of plugs. Also, check out the replacement junction box with 7-way connector.

Helpful Links

faq-wiring.aspx

Reply

Answer 1

You can certainly add a 7-way trailer connector to your trailer with 6 wires. You would simply have 1 pin on the 7-way connector that did not function. I recommend adding a 7-way molded trailer wire connector like part #H20046, and a junction box…

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Answer 2

I see the door thickness picture you attached but that's the only picture that made it through. The part #295-000019 is a standard RV style latch that can fit door thicknesses of up to 1-1/2 inches so this would work but it requires a cut out…

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Answer 3

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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Answer 4

Typically, the black wire is 12-volt power, and the red wire is left turn/brake lights. But you cannot always go by color. If the wiring in question is on the trailer side, then there are two ways to determine which color wire does what function.…

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Answer 5

Sounds like your trailer wiring does not have a ground circuit for it's connector. The easy solution for that is to run a wire from the ground pin of the connector to the trailer's frame. Your trailer electronics should work a little…

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Answer 6

To get power to the pin in the 1:00 position of the #PK12703 7-way trailer connector, you'd run a length of 10 gauge wire #10-1-1 which is sold by the foot from the terminal for the 1:00 pin on the 7-way to the positive battery terminal, via…

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Answer 7

First, I have included some pictures, one showing batteries connected in series and the other of batteries connected in parallel. Typically the black wire is the 12 volt power wire and white is the ground. That is the way it is on the 4 to 7-Way…

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Answer 8

Typically, the wire colors are brown for running lights, green for right turn and brake lights, and yellow for left turn and brake lights. White is ground. To confirm this on a trailer you can trace the wires back to see where they terminate or…

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Answer 9

It sounds like your trailer had a wishbone harness and/or could have multiple ground wires. On a 4-Way trailer end, the one covered pin is the ground. Next to that is the running light pin. The running light pin on some connectors will have more…

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Answer 10

The auxiliary 12-volt wire that runs from the 7-way connection to 7-way trailer plug will supply 12-volt power from the vehicle to the trailer. The 12 -volt power will allow interior or exterior lights to run that are not wired in to the…

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Answer 11

I can give you a list of parts below that will be needed to rewire a trailer which you can then use when combined with the labor rate of the shop to give you an estimate but it can be very hard to estimate the price of said job because the labor…

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Answer 12

Our installer here will spray the light with some lubricant around where the light meets the grommet and then will use a screwdriver to pry the light out first, and then the grommet. If you check out the install video I attached you will see this…

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Troubleshooting Wire Functions On Trailer With 6 Wires

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