Recommended 4-Way Wiring Harness For Trailer Side

Question

Question:

Do you have the trailer wiring harness that goes with a Tekonsha T-One vehicle wiring harness with 4-pole flat trailrt connector.

asked by: Jim B

0

Expert Reply:

The 4-way flat trailer harness I recommend is the Optronics 35 ft. Wishbone 4-Way Trailer Wiring Harness with 42" Ground Wire # A35W42B. This harness is a wishbone and that means it will have a tail light wire on each side of the trailer so you won't need to run a jumper across the frame. This harness makes it quick and easy to wire your trailer. This harness is compatible with any 4-way flat vehicle side trailer connector like the T-One you referenced.

I've attached videos for your convenience.

expert reply by: Jason S

0

Answer 1

The Trailer Wiring Junction Box part #3375601100 and Trailer Wiring Junction Box part #38656 are both pretty standard 7-terminal junction boxes. The latter is slightly smaller so there will be more places to mount it so that is what I recommend but…

view full answer...

Answer 2

Typically you only need to run three/four wires for standard trailer lighting. One for running lights to each assembly and then two for each stop/turn light. Sometimes you have to run the ground wire to each assembly but typically they ground through…

view full answer...

Answer 3

There's not a universal way that trailers are wired. I have attached a diagram showing the three typical ways and this should also help you to connect to the 7-way harness you purchased once you identify your wires. Yours is obviously different,…

view full answer...

Answer 4

The jacketed circuit is the ground. The one right next to that one is the tail light circuit, next to that one is the left turn circuit. And then the last one on the end is the right turn circuit. Check out the picture I attached to see the circuits…

view full answer...

Answer 5

The ring terminals you want to use with the junction #3375601100 are the #44-5310A which have an inner diameter of 3/16 of an inch.

view full answer...

Answer 6

I reached out to Optronics and they confirmed that the wire used in the 35 Ft 4-Way Trailer Wiring Harness - Wishbone Style #A35W42B is 100% copper. This harness comes with 2 tail light wires split for simple wiring and has a 3 year warranty.

view full answer...

Answer 7

The amber side marker lights and the license plate light on a trailer would need to be ran to the running light circuit like you mentioned. This is typically the brown wire. I attached a diagram that should be helpful as well.

view full answer...

Answer 8

We do have the passenger side Optronics ONE Series LED lamp. The part #is STL008RB.

view full answer...

Answer 9

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…

view full answer...

Answer 10

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…

view full answer...

Answer 11

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…

view full answer...

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.

view full answer...