Does 12V Pin on 7-way Trailer Connector Always Have Power

Question

Question:

Is the + side of my 7 way trailer connector always powered

asked by: Bill P

1

Helpful Expert Reply:

It sounds like you're asking about the 12V circuit on the 7-way trailer connector on the rear of your 2003 Chevrolet Trailblazer. Some vehicles will always have power and some others will not. We don't have this specific information for your vehicle, but to determine if your 12V always has power you can test the pin in the 1 O'clock position on your 7-way.

The other pins will have power when the corresponding light is used or the brake pedal is pressed.

expert reply by: Charles S

1

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James P.

8/5/2020

My F-250 doesn’t have constant 12v to the trailer plugin. How can I get a constant 12 volts?

Reply

Chris R.

8/15/2020

If you want to have constant 12V power to the trailer, even when the truck's ignition is off, you can simply manually run your own hot lead. To do this run a length of 10 gauge wiring # 10-1-1 from the 12V pin on the 7-Way up to the battery's positive post via a circuit breaker like # 9510.

Reply

Answer 1

The only pin that should be continuously showing 12V power on the 7-Way connector on your vehicle is the 12V power circuit which is normally the black wire but not always. In 7-way wiring the 12V auxiliary power feed is carried on the contact at the…

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Answer 2

The light that indicates that the 12 volt circuit is hot is normal and it will not drain the battery. Think of it as the battery having a really long positive terminal that just extends to the rear of the vehicle. If nothing is drawing power from it,…

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Answer 3

Some trailers may need an auxiliary power source to power additional 12 volt items on the trailer but this isn't as common as you might think. Now instead of aux power reverse lights are more common on vehicle side trailer connectors (and still…

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Answer 4

The Advent Air RV Air Conditioner w/ Air Distribution Box, #ACM135CH requires an opening of 14-¼” by 14-¼”; this is the unofficial industry standard with a tolerance of +/- about a 1/8”. This is for roofs 2-1/2" to 5" thick. This…

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Answer 5

The auxiliary 12-volt wire that runs from the 7-way connection to 7-way trailer plug will supply 12-volt power from the vehicle to the trailer. The 12 -volt power will allow interior or exterior lights to run that are not wired in to the…

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Answer 6

I have 4 tire cover options that will fit your 315/80R22.5 tires. Each option listed below comes with 2 covers, so you will want to order a quantity of 3 for 6 tire covers. Adco #290-3976 - Black Adco #290-3956 - White Adco #290-3656 - Camouflage…

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Answer 7

The first thing you'll need to flat tow your 2015 Chevy Malibu LS is a base plate kit like the Roadmaster part #RM-523178-5 that is a confirmed fit. In addition to the base plates, you will also need a compatible tow bar, safety cables, lighting,…

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Answer 8

Thank you for the photo of your vintage utility trailer's spindle. The simplest and surest way to identify a compatible trailer hub is to identify the inner and outer bearings and the grease seal it uses. Matching up those components along with…

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Answer 9

You can put a maintenance charge on your trailer battery with the 12 volt accessory circuit of the 7-way. The 1:00 position of your 7-way carries this circuit. You would just need to run a length of 10 gauge wire like part #10-1-1 (sold by the foot),…

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Answer 10

It is not recommended to supply power to a brake controller from anything other than the vehicle battery or a dedicated fuse in the fuse box. When the brake controller is sending power to the trailer brakes, it will draw approximately 2 to 3 amps for…

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Answer 11

Unfortunately a trailer wiring converter module like #118426 can go bad at any time without any notice. It is rare, but can happen. The module has a circuit board that will work great until it doesn't and if that goes, it can do some odd things…

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Answer 12

The Tekonsha Prodigy P3 Brake Controller, #90195, does not have an on and off switch. It will go into sleep mode after several minutes of no activity. The power draw when it is in the sleep mode is so negligible that it will not discharge the…

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Does 12V Pin on 7-way Trailer Connector Always Have Power

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