7-Way Trailer Plug With Wires For Connecting to Lights & Brakes

Question

Question:

Im looking for a wiring harness for a gooseneck flatbed trailer that includes the wires that go to the running lights, brake/tail lights, brakes, ect. All I can find is the plug but not the actual wires that run to the lights and brakes. Maybe Im searching it wrong? Can you point me in the right direction? Thanks.

asked by: Dan R

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Expert Reply:

Hi Dan, and I believe you are looking for a 7-way with the wires connected such as the 4 foot long Hopkins 7-Way # H20043, 8 foot long # H20046, or 11 foot long # HM20048.

These have the plugs as well as wire leads that go to your junction box, though if you don't have a junction box you can also get that with part # 3375601101.

The actual wire itself is something you have to get separate, depending on the length you need. You order it by the foot: 16 gauge # 16-1-1, 14 gauge, # DW02422-1, 12 gauge, # 12-1-1, or 10 gauge # 10-1-1.

expert reply by: Kyle S

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Answer 1

I've attached a wiring diagram for the 7-Way Molded Trailer Wire Connector #H20044, however there is no guide available to tell us the wire color functions on the trailer so you'll have to test each wire in order to determine its function. If…

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Answer 2

In order to charge an on-board trailer battery you'd need to have a seven way connection on both the vehicle and trailer, this would contain the necessary circuits to pass a charge from the vehicle battery to the trailer battery. If you don't…

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Answer 3

To completely rewire your 20' trailer from start to finish I recommend using the following parts: 7-Way Connector and Cable - Hopkins Molded Cable 8' Long item #H20046 Junction Box - Trailer Wiring Junction Box - 7 Color Coded Terminals item…

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Answer 4

Thank you for the pictures Matt. I do see you have the backing plate for the brakes so you are most likely going to have #84 spindle since your axle has a 3,000lb capacity. You can verify this by removing one of your hubs and measuring the landings…

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Answer 5

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 6

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…

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Answer 7

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…

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Answer 8

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…

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Answer 9

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…

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Answer 10

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…

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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…

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Answer 12

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…

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7-Way Trailer Plug With Wires For Connecting to Lights & Brakes

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