Recommended Trailer Wiring Harness for a Boat Trailer

Question

Question:

I am having some issues with my boat trailer lights. Its a standard 4 plug and there are two marker lights along with a license plate light and of course the running brake and turn are combined in one unit. Which wire kit should I get from you?

asked by: Eric P

0

Expert Reply:

The Optronics 25 foot 4 Way Wire Harness # A25W2GWB will be a good option. This will generally have enough length to cover most trailers. I will also recommend adding in a few of the Spectro Self-Stripping Connector with Waterproof Sealant # SWC501746-1. These will make splicing into the # A25W2GWB significantly easier. Especially for your side marker lights.

expert reply by: Lazer S

0

Answer 1

We may have a grease seal that will work in your application however, my research had conflicting measurements for the Hadco 3122 that you referenced. I contacted my technical contact at Redline to verify that the Redline Grease Seal #1105-100-031…

view full answer...

Answer 2

To use the Optronics Trailer Lights, item #STL22CCRB, on your boat trailer you will need several parts. I will list them below. 2 each Optronics Trailer Lights, item #STL22CCRB 2 each Rubber Grommet for 6-1/2 inch Oval Trailer Tail Lights, item…

view full answer...

Answer 3

While tinned wiring is the norm when it comes to interior wiring on boats, boat trailers see a minimal amount of water compared to the actual boats. They do use a tin coating on the pins that are the parts of a wiring harness like the Wesbar 5-Pole…

view full answer...

Answer 4

Currently the only wiring harnesses we have with a 5-way flat connector are like the 25 Ft 5-Way Trailer Wiring Harness #A25W5B and 40 FT Harness #A40W5B. These harnesses use 6 wires coming from the connector. It has a short 5' blue wire to run…

view full answer...

Answer 5

What you have is a wishbone style of 5-way that has the ground and running light circuit split for either side of the trailer. You can replace this setup with one that has a single wire by running both of the wires on the trailer side to the new…

view full answer...

Answer 6

In order to splice into the wire and add yellow side marker lights like the #MCL13A2B I recommend using the Self-Stripping Connector with Waterproof Sealant #SWC501746-1. This is designed to make a quick connection without cutting or stripping, and…

view full answer...

Answer 7

Either option will work fine. If it was my decision to make I would ground the trailer wiring on the frame near the coupler since that's easiest and just as effective, but if you had an aluminum frame trailer or a dump trailer you'd have to…

view full answer...

Answer 8

I would certainly recommend the 1/2-inch wire loom #459075-1. It will hold two jacketed 2 wire 10-gauge wire and three jacketed 2 wire 12-gauge wire. See pictures to the right. In addition, I was able to fit comfortably eleven individual 16-gauge…

view full answer...

Answer 9

In order to secure the cord from your 7-way to the trailer frame I recommend using the Steel Tubing Clamp - 3/4" Diameter - Qty 1 #SWC9024-1. This will be able to secure the wire and also allow the cable to still move and not bind when turning.

view full answer...

Answer 10

Since you found low voltage when testing the right side signal light pin on the vehicle connector, you have at least isolated the issue to the truck. If all the wires appear to be in good condition, then the issue is likely either a weak ground like…

view full answer...

Answer 11

Since this is on a boat trailer the 2 additional white ground wires are ground for the lights. This is fairly common on aluminum frames and boat trailers in general because aluminum is a poor metal for grounds and lights grounded near the tail lights…

view full answer...

Answer 12

The 4-way harness you looked at, part #A25W2GWB, has a ground wire. It's the white wire which is kind of hard to see in the pictures. This is a wishbone 4-way so there are two brown wires for running lights; one for each side of the trailer. Then…

view full answer...

Recommended Trailer Wiring Harness for a Boat Trailer

Products Referenced in This Question

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching