Wiring Code For Hopkins 7-Way # HM20048

Question

Question:

Does the black 12 volt accessory wire have to be utilized in order for the trailer brakes to work?

asked by: Curtis M

1

Helpful Expert Reply:

When installing The Hopkins 7-Way Molded Trailer Wire Connector # HM20048 on your 1984 Chevrolet C/K Series Pickup the black 12 Volt hot lead will have to be used in order for the brakes to work. I have attached the wiring code below:

White Wire - Ground Usual Trailer Wire White
Black Wire - 12 Volt (Hot Lead) Usual Trailer Wire Black ( The black wire for a traditional brake controller that ports doesn't necessarily need to be active for it to work)
Green Wire - Tail Lights Usual Trailer Wire Brown
Brown Wire - Right Turn Usual Trailer Wire Green
Blue Wire - Brake Power Usual Trailer Wire Blue
Yellow Wire - Reverse Usual Trailer Wire Purple
Red Wire - Left Turn Usual Trailer Wire Yellow

I attached a review video link below.

expert reply by: Noah E

1

Answer 1

The Mighty Cord 7-Way RV-Style Trailer Connector, #A10-7W8, will have the same wiring configuration as the Hopkins 7-Way Molded Trailer Wire Connector, #H20046. I recommend the 7-Way Molded Trailer Plug with Junction Box , #HS381-9000. The junction…

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Answer 2

We do offer various trailer wiring adapters to allow connecting a vehicle and trailer that use different connector types and all such adapters can be see on the linked page. For an adapter to join a round-pin 7-way on the vehicle to a 7-way blade (RV…

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Answer 3

It differentiates from how other 7-Ways are wired like agricultural and utility equipment. The Hopkins 7-Way item #HM20087 you were looking at is wired in the RV style which is consider standard. You do want one in the standard 7-way RV style.…

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Answer 4

There are two different styles of 7-way wiring typically seen. Traditional and RV Standard. The pins all have the same functions but the difference is the wire colors. If you check out the picture I attached you'll see the two different versions…

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Answer 5

Either way is correct. It depends on if you want to keep the semi-style 7-Way (if you need to tow that type of trailer) or if you will never be towing a semi-trailer. If you need to keep the 7-Way semi active on the truck, then you would need to make…

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Answer 6

The Mighty Cord 7-Way RV-Style Trailer Connector w/ Molded Cable - Trailer End - 10' Long #A10-7W10 is what you are seeking. RV wiring is the same as regular trailer wiring as far as locations, just the wire colors differ slightly. I've…

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Answer 7

Hello Juan, thanks for reaching out. There are a number of factors involved when converting a semi 7-way to an RV 7-way. Semis generally use a 7-pin round pin socket, similar to #PK11720. And RV style 7-way uses blades, like #PK12706. We do not offer…

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Answer 8

There are a number of factors involved when converting a semi 7-way to an RV 7-way. Semis generally use a 7-pin round pin socket, similar to #PK11720. And RV style 7-way uses blades, like #PK12706. We do not offer any pre-made adapters to make this…

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Answer 9

All the brake controller needs to sense a trailer connection so that you can test it is a slight amperage draw on the output circuit. For that you can use a circuit tester like the part #PTW2993 with one pin grounded and the other on the output pin.…

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Answer 10

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 11

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 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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Wiring Code For Hopkins 7-Way # HM20048

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