How to Correctly Wire a 7-Way Trailer Connector

Question

Question:

If my wiring is all there and I have a black and blue wire thats lose from trailer looks like if they grounded it with the blue and black but theres another black and blue from the trailers battery and theres 2 white wires. And I am ready hook up the new connector and my lights dont power on? I think i used a universal connector. Help? Thanks

asked by: Santos

0

Expert Reply:

It sounds like you have a 7-Way connector on your trailer like part # H20046. The problem with trailer wiring is that there are common wiring colors but there aren't any standards so any color can be used for any function.

To make sure that you connect all of the correct wires to the correct pins I recommend taking a 12V battery and test all of the wiring to figure out their functions. Ground the negative terminal and then use a wire on the positive terminal to do so. You can use the attached diagram to ensure that you have everything connected properly.

expert reply by: Jon G

0

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Answer 1

It is likely that the red wire on your old lights is the turn signal/brake light wire, and the black wire is the running light wire. That would make the white wire the ground. You can verify this by testing the wires using a circuit tester such as…

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Answer 2

I attached a diagram that shows how most 7-way rounds like the #PK11720 that you referenced will get wired up. As long as you got yours wired up correctly and your trailer taillights and brakes are functioning correctly that's all that should…

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Answer 3

The pin-out for a 7-way trailer connector is pretty consistent. Unless the connector was wired incorrectly, it should be wired as shown in the provided photo showing the correct pin-out. What CAN vary is the wire color codes, which are also shown in…

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Answer 4

I attached a picture for you to use as a guide for wiring in your trailer's 4-way wiring to a 7-way socket connector. The yellow wire is the left turn/stop circuit that you have out of the connector.

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Answer 5

The method you described would be a great way to determine what length to cut the #H20046. That way you would end up with enough wire that it wouldn't come unplugged when making a tight turn. Securing the wire up and out of the way is a smart…

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Answer 6

Unfortunately not all trailer manufacturers will use a standard wiring color code but we still can help you determine what to do with the wires of your trailer. First we need to identify what all of the functions of your wires are. To do this…

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Answer 7

The Boat Buckle Mounting Bracket part #IMF14254 comes with Grade 5 hardware. You certainly could go to Grade 8 if you wanted to but as long as you are using these brackets like they were intended it would not be needed. Fun fact...to determine the…

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Answer 8

The trailer wiring would have to be either a 5-way or 7-way as those are common styles that have the reverse light circuit available. It would just be a matter of running that circuit from the trailer wiring connector to the power wire of the light…

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Answer 9

Provided that you have the space and mount it properly you could mount a scissor jack such as #UF48-979032 any which way you want. You might be interested in a different type of stabilizer such as #UF39-941705 which is electric or #UF39-941704 which…

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Answer 10

The manual lockout on your Atwood 85778 surge brake coupler is there so that you can back up the trailer without the brakes locking up on you. Yes you can safely tow your trailer with the broken manual lockout, you just have to make sure you…

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Answer 11

From what I could find it looks like your 122R (red) and 122Y (amber) lights measure 3.75" x 1.70" x .81". We don't have any replacement lense directly for the GLO-BRITE lights but we do have some similar lights that you could use…

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Answer 12

The correct replacement for a Demco Master Cylinder 05680-C is the Replacement Master Cylinder part #5650. I spoke with Demco to confirm this for you.

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How to Correctly Wire a 7-Way Trailer Connector

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