Does the Ground Wire On the 7-Way Need to Run to the Battery

Question

Question:

If you run a 10 ga wire to the positive post do you also need to run a wire from the negative pin to the negative post on the battery

asked by: David

1

Helpful Expert Reply:

In regards to wiring a seven way trailer connector, the twelve volt power wire or otherwise known as the battery charge line circuit will need to be run from the trailer connector to the positive terminal of the battery. The ground wire circuit from the trailer connector does not need to be run to the negative battery terminal, it can just be ground to the frame or body. I recommend the 7-Way Install Kit part # ETBC7 which comes with everything you need. The duplex wire has two ten gauge wires, one will run to the battery and the other to the brake controller in the vehicle acting as the brake output wire, not the ground.

expert reply by: Conner L

1

Answer 1

I have added a photo detailing the wiring connections for the Pollack Heavy-Duty, 7-Pole, Round Pin conncetor, #PK11700, see link. This is a SAE J560 compliant connector. The wiring diagram for the vehicle side connector, #PK11720, is pictured also.…

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Answer 2

The best option for wireless brake controllers is the Curt Echo #C51180. It is the easiest to plug in and go when you need to use a brake controller with your trailer. Once you have a 7-way connector installed in your vehicle, all you need is to…

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Answer 3

When it comes to plugging into the Tekonsha Prodigy RF Wireless brake controller there is a couple different wires you will need. First you will need to install The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector #TK99FR this will…

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Answer 4

If you have a vehicle specific wiring harness for a brake controller then that would indicate that you have a factory tow package and subsequently would already have a 7-way at the back of your vehicle. The universal 7-way connector #ETBC7 is meant…

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Answer 5

It's a wire color difference but not a function difference on the pins of the 7-way. The difference comes from the fact that the two different styles are representative of two different areas that uses trailers. Traditional is usually seen on…

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Answer 6

The reverse light pin on a traditional 7-way trailer connector, like part #PK11893 or a factory connector if that's what you have on your 2018 Ram, is the center pin. Take a look at the picture I attached that shows all the pin functions. To add…

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Answer 7

That's an excellent question, and the answer is there isn't a hard-and-fast number that means a weight distribution hitch is required. The best way to assess this is if the sag is noticeable, either visually or when towing. You really want to…

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Answer 8

The Tekonsha Prodigy RF Wireless Trailer Brake Controller #TK94FR is a great unit for use with your 2014 BMW X5d. To make this unit interchangeable with multiple trailers, you will need to manufacture a bracket that will allow the unity to firmly…

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Answer 9

Putting self-tapping screws into the Curt Trailer Hitch Receiver #C15312 for your 2005 GMC Sierra 2500 won't weaken it but I can't speak to the warranty part. I would think that something that small would be a non-issue unless for some reason…

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Answer 10

To add a 7-way to your 2018 Volkswagen Tiguan you need to add a 4-way connector #118811 and after adding a 4-way you can convert it to a 7-way with #ETBC7 which is a universal 7-way wiring kit. The 7-way has to have the 4-way to work. I have attached…

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Answer 11

It looks like the interior of the switch was damaged. It's not a big deal assuming it's an electric breakaway system. You can just replace the switch assembly very affordably. The switches use two wires to connect, so they're not system…

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Answer 12

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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Does the Ground Wire On the 7-Way Need to Run to the Battery

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