How To Wire In A 7-Way To Replace A 5-Way Flat

Question

Question:

My trailer only has 5 wires but the new plug I bought has 7 so I’m not sure how to wire it.

asked by: Randy

0

Expert Reply:

You can install the 7 way plug in place of the 5-way that is installed on your trailer currently. The colors would not 100% match up. But white would go with white which is your ground wire. Green goes to green which is your right turn signal. Yellow goes to yellow that is your left turn signal. The black wire goes to the battery. It's a lot better to test them by function.

There will be two additional wires, The blue wires goes to the brakes and the wiring let alone will be the auxiliary wire. If your color of wires is different you would need to trace the wires and see what function that they have or you could use The Hook Probe Circuit Tester # PTW2993. Using this tester will let you test your connections easier and will let you know which wire has what function.

I attached a review video link below

expert reply by: Noah E

0

ETBC7 Wiring Diagram
(click to enlarge)

Answer 1

Aluminum trailer tires typically have a really nice seal but they also are not normally rated for as high a weight capacity on an 8 bolt wheel. They are a softer metal so they do tend to be more durable when it comes to flex. My recommendation is the…

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Answer 2

You have it right so far, the 4-way connector is just as you have stated. Remember that Yellow has a L in it so that is the left side brake/turn signal and green has a R in it so that is the right side brake/turn signal. The colors for wiring a 7-way…

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Answer 3

Most likely the colors would match with the exception of the red wire on the trailer going to the white wire on the truck. The white wire is the ground circuit so you can trace the RED wire on the TRAILER to see if it attaches to a metal surface on…

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Answer 4

On the 7-way connector that is on your vehicle, the pin you will connect the brake controller wire to is the (2) pin. If you are looking at the inside (back) of the 7-way connector, it will be the pin at the 7:00 position. Looking at the 7-way from…

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Answer 5

The best solution for your situation would be to use a circuit tester, like part #PTW2993, to wire your trailer wires to a seven-way trailer connector, like part #A7WCB. Wiring by function is the best way to make sure you have the trailer connector…

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Answer 6

You can use a standard 5-pole trailer connector, you'll just need to wire it a certain way. The #HM47900 you referenced is the vehicle side connector, you need the trailer side connector like part #HM47910, which would wire as shown in the…

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Answer 7

Based on my research, the Trailer Hub and Drum Assembly - 8,000-lb E-Z Lube Axles #AKHD-865-8-EZ-K will be a replacement for the 90865 Rockwell hub and drum. Both of these hub and drum assemblies are 12-1/4" diameter, have an 8,000 lb capacity,…

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Answer 8

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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Answer 9

Seal 171255UC has an inner diameter of 1.719 inches and outer diameter of 2.565 inches. A seal that has those dimensions would actually be #58846. I've added a link to a video review of this seal for you to take a look at.

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Answer 10

If the trailer wheels scrubbed (dragged and scrapped the ground instead of rolling) when jack knifed then it could have thrown something out of alignment or damaged something. First, inspect the suspension. Look for any elongated holes where…

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Answer 11

The number you provided, "7753400" is a patent number which corelates to the Equalizer for E-Z Flex Suspension part #013-144-03. This is for a single equalizer but if you need the entire kit it's the Dexter E-Z Flex Suspension Kit part…

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Answer 12

For your enclosed trailer application I have several suggestions for adding interior lighting that you can control directly via a switch. Since your current 4-pole trailer wiring does NOT include a 12V auxiliary power feed that could power inside…

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How To Wire In A 7-Way To Replace A 5-Way Flat

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