Square LED Trailer Lights and 5-Way Wiring Harness for a Wesco Boat Trailer

Question

Question:

I have a 26foot WESCO aluminum beam trailer for a 22foot boat. The wiring harness is shot and lights are old bulb style. It has a reverse solenoid for disc hydraulic brakes on tandem axel. It currently has the small square lights in back. What is the over 80 and under 80 thing? Is that height of boat on trailer off ground? Also, with the brake release solenoid, I think I need a 5 prong flat wiring harness at least 25foot long- cannot find on your site. Any help on lights and wiring replacement suggestions?

asked by: Andrew I

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Expert Reply:

Over or under 80 means 80 inches of width. There are certain lighting requirements if the trailer is more than 80 inches wide. Trailers that are less than 80 inches wide can still use lights that are indicated as over 80 inch.

Since you need a 5-way wiring harness I recommend getting the lights separately, # STL8RB and # STL9RB, and then getting # A25W5B for the harness. This is a 5-Way wishbone harness. That means that the running light pin has 2 wires for running lights on each side of the trailer. It is so you don't have to splice in a jumper wire.

For over 80 inch wide trailers use # STL3RB and # STL2RB. I have included a link to trailer lighting requirements for you as well.

expert reply by: Michael H

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Answer 1

When the L68149 bearing is paired with the L68111 race, the 10-19 grease seal is used. However when the same bearing is used with the L68110 race on a boat trailer, the #168233 seal is usually used. You can verify this by using a digital caliper to…

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Answer 2

Since you have six wires it sounds to me like you have a double ground and a left and a right side tail light wire. If this is the case you could use a wishbone harness like the 20 ft. Wishbone 4-Way Trailer Wiring Harness with 30" Ground Wire,…

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Answer 3

It sounds like your trailer had a wishbone harness and/or could have multiple ground wires. On a 4-Way trailer end, the one covered pin is the ground. Next to that is the running light pin. The running light pin on some connectors will have more than…

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Answer 4

You can change the lens around on the LED Trailer Fender Clearance Light - Submersible - 2 Diodes - Amber/Red - Driver or Passenger Side item #MCL180ARB. This light can be mounted on both sides but does not come in a different orientation because you…

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Answer 5

You absolutely can mix LED and Incandescent lights on your trailer. For your PM444 replacements, I recommend the Optronics Over 80" Wide, Square LED Trailer Tail Light, 7-Function, 18 Diode, Right Hand #STL2RB and Left Hand #STL3RB. The LED…

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Answer 6

I don't see why you couldn't use the LED Combination Trailer Tail Light #STL2RB upside to replace your driver side light. The only thing that might be weird is how the light will mount to the trailer physically since you're using the…

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Answer 7

You do not have to change all of the trailer lights to LEDs in order to install and use the LED Trailer Fender Clearance Light #MCL180ARB. You can have a mix of LED and incandescent. The only drawback is that if you had an LED light right next to an…

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Answer 8

Although we do have a fender with similar dimensions, we do not carry anything that is an exact match. When choosing a replacement you want to do your best to match the dimensions of your old fender, but more often then not an exact match is not…

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Answer 9

Thanks for the picture. I found a great replacement tail light combo for you. I recommend the Optronics LED Combination Trailer Tail Light - Submersible - 7 Function - 18 Diodes - Square - Passenger Side item #STL2RB. And driver's side item…

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Answer 10

You do not have to connect the ground wire of the LED Trailer Fender Clearance Light #MCL180ARB to your main ground that goes to the wiring box. What you can do is use a ring terminal such as #44-5310A and screw like #101131802 and ground it to your…

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Answer 11

That looks a lot like our part #MCL180ARB. Check out the dimensions in the diagram and compare them to yours. If they don't match let me know what they are but I think this is the correct light.

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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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Square LED Trailer Lights and 5-Way Wiring Harness for a Wesco Boat Trailer

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