How to Wire the 4-Way Round Socket for the Blue Ox 7-Wire to 4-Wire Adapter # BX88254

Question

Question:

I am wiring the the 4 wire socket that this part [already ordered] will connect to, but I am seeing many different wiring diagrams for it. What is the proper order to connect my 4 wires at the 4-wire socket? is it [front view] Top Left: green, T/R:Brown, Bottom Left: White, B/R: Yellow? Why are there so many different diagrams showing the connections differently?

asked by: Bob

0

Expert Reply:

There are so many different diagrams on how to wire a 4-way round trailer connector because a standard has not been set on how to wire this type of trailer connector. This is likely because 4-way round trailer connectors are not very common.

I spoke with my contact at Blue Ox to determine how they wired their 7-Wire to 4-Wire Adapter, # BX88254, that you are planning on using. When looking at the front of the socket, wire the 4-way round socket as follows -

Top Left - Left stop/turn, yellow wire
Top Right - Right stop/turn, green wire
Bottom Left - Ground, white wire
Bottom Right - Tail Lights, brown wire

I have attached a diagram for you showing the front and back of the socket.

expert reply by: John H

0

click to enlarge

Jeff

4/24/2025

Hi John, I wired the cable as you suggest. Everything works, but i don't have running lights. Am I missing something?

John H.

4/28/2025

@Jeff If you use a 12v circuit tester on the bottom right pin of the vehicle socket, do you have power when the running lights are on?

Answer 1

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Answer 2

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Answer 4

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Answer 5

I have attached a photo of a typical 4-way round connector with the pins labeled you can check out. The photo has both the trailer side and vehicle connectors labeled.

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Answer 6

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Answer 7

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How to Wire the 4-Way Round Socket for the Blue Ox 7-Wire to 4-Wire Adapter # BX88254

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