Wire Gauge for Optronics 25 ft. Wishbone 4-Way Trailer Wiring Harness

Question

Question:

Gauge? Is it all AWG 16?

asked by: Brian D

0

Expert Reply:

Hi Brian; all of the wires used in the 25 ft. Wishbone 4-Way Trailer Wiring Harness # A25W42B are 20 gauge. If you have any other questions feel free to reach out in the comments below.

expert reply by: Robin H

0

Optronics Wishbone 4-Way Trailer Wiring Harness
(click to enlarge)

Robin H.

10/30/2025

Hey Brian, did the 20-gauge wiring on the 25 ft. wishbone harness end up working for your trailer setup? Knowing how it performed could help others choosing between wire sizes.

Brian J.

10/30/2025

@RobinH Dunno, didn't use it. I guess MAYBE AWG 20 is plenty, but since I'm no electrical engineer, I just went with a more standard 16 purchased as individual wires rather than the convenience of all-in-one four wiire strip. In fact, I could be wrong, but it seems to me that somewhere in eTrailer's FAQs you recommend something much more substantial than 20g for marker lights.

Answer 1

Hey Ken! There are 4-flat trailer wiring setups to run 2 sets of trailer lights. Optronics offers the 25 ft. Wishbone 4-Way Trailer Wiring Harness #A25W42B and the 40 ft 4-Way Wishbone Trailer Wiring Harness #A40W42B. These come with bare wires that…

view full answer...

Answer 2

I'm assuming you want to replace everything here so I will start off with a 4-way. I recommend using the Hopkins Endurance 4-Way Flat Trailer Wiring Harness - 30' Long #HM48265. This will give you a lot of wire to work with so you can hook up…

view full answer...

Answer 3

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 4

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...

Answer 5

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 6

According to Blue Ox, it'll take an experienced installer about 4 to 5 hours to complete the installation of their #BX1128 Base Plate Kit on a 2016 Jeep Grand Cherokee. The install isn't what I'd call super-difficult, but the installation…

view full answer...

Answer 7

Hey Andrew! Yes, Furrion does have a Chill Cube model with a heat pump. This was actually just released for aftermarket sale. You will need a complete system to make the switch, new R32 units aren't backwards compatible with old R410A systems.…

view full answer...

Answer 8

Hi Paul, you’re definitely on the right track here, and I can help you narrow this down with confidence. With your tandem 3,500 lb Dexter axles and 33 inch spacing, both the Dexter EZ Flex part #K71-652-00 and the Lippert Road Armor part #LC53CK are…

view full answer...

Answer 9

It sounds like you are speaking of the wires for the brake magnets. If this is correct, you will need to connect one of the wires to the brake controller output wire on your trailer connector and the other wire will need to be grounded to a clean…

view full answer...

Answer 10

That's a very good question, we tend to be extra cautious and say to use 10 gauge wire because that would be more than enough. When you get into longer trailers that will end up using a lot of wire the heavier gauge wire becomes more necessary.…

view full answer...

Answer 11

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

view full answer...

Answer 12

Even though I cannot comment specifically on the grease you used because I am not familiar with it, I can tell you the best grease for trailer bearings is a a grease with a rating of GC-LB, which just means it is made to withstand very high…

view full answer...

Wire Gauge for Optronics 25 ft. Wishbone 4-Way Trailer Wiring Harness

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching