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


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


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.

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Charles S
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James P.


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

Etrailer Expert

Chris R.


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.

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