Can Wishbone Trailer Wiring 4-Way be Used with Single Wire 4-Way for Running Light Circuit

Question

Question:

# A35W42B this plug came attached to the trailer. I was wondering if the male end attached to the truck could work if it only had one brown wire?

asked by: Gaddreal

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Expert Reply:

Yes the wishbone style 4-ways like part # A35W42B are perfectly compatible with 4-ways on vehicles that only have a single wire for the running light circuit. This is very common and wouldn't be an issue at all.

expert reply by: Jameson C

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Answer 1

It sounds like you have a wishbone wiring harness install on your trailer. A regular 4-way wiring harness has 4 wires from the back of the connector, 1 for left turn/brake typically (yellow), 1 for the right turn/brake typically (green), 1 for the…

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Answer 2

Trailer brakes use a magnet for activation that is not polarity sensitive. That means that either wire can be used as the power or the ground as long as the other is the opposite. I'd check to see where all three of your wires run on your trailer…

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Answer 3

Typically 4-way wiring consists of 18 and 16 gauge wires. For a 4-way that has all 16 gauge wire you would want the Wesbar 4-Pole Flat Connector #W787264. The part #HM38138 uses 18 gauge for all wires but the white that uses 16 gauge.

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Answer 4

Your 4-pin/5-wire wiring harness is what is called a "wishbone" type which simply means that there are two separate running light wires, one brown and one pink. This allows a separate running light wire for each side of the trailer which…

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Answer 5

You have a wishbone harness like #A20WB. This type of wiring harness splits the running light circuit at the trailer connector, so you don't have to run a jumper wire from taillight to taillight. The yellow/brown wire is the running light circuit…

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Answer 6

You can use the Curt T-Connector 4-Pole wiring harness #C55384 plugged in at the back of your existing factory connector to provide a 4-pole plug for your lighted hitch cover. This harness connects inline between the existing connector and the…

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Answer 7

What you have a is a 4-way Wishbone trailer connector like part #A35W42B. The two brown wires are both the running light circuits. One needs to ran to each side of the trailer. This makes the wiring a little easier instead of having to run the brown…

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Answer 8

It sounds like your trailer had a wishbone style wiring harness. A wishbone harness splits the running light circuit at the connector so you do not have to run a jumper from one side of the trailer to the other side. To replace the plug you're…

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Answer 9

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

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Answer 10

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

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Answer 11

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

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Answer 12

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

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