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How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban

Introduction

Even though 2007-2014 Chevrolet Suburbans come with a trailer tow package, the manufacturer has neglected to connect the wire that enables the 12-volt auxiliary pin on the 7 pin connector. This technique allows tail lights and blinkers of any tow-behind trailer to be powered by the vehicle. It will also power any other appliances that may be in the trailer such as refrigerators or microwaves. This is an easy fix that may cost $75-100 for a professional to execute.

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  1. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban, How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 1, image 1 de 1

    • Locate the wiring harness bundle, which exits the firewall underneath the brake booster.

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  2. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 2, image 1 de 1

    • Identify the auxiliary wire, which is folded and taped to either the wiring harness or the fire wall.

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  4. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 3, image 1 de 1

    • Use a knife to cut the tape away from the wire and unravel it.

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  5. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 4, image 1 de 1

    • Run the wire against the battery box.

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  6. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 5, image 1 de 3 How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 5, image 2 de 3 How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 5, image 3 de 3

    • Place the ring terminal (washer end) of the wire on the right post located at the front of the battery.

    • Place the 10 mm washer on the post.

    • Tighten the washer using a 10 mm wrench, crescent wrench, or pliers.

    • Post size and location may vary slightly in different models. The washer will fit snuggly around the correct post.

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  7. How to Activate 12 V Aux Power in a 2007-2014 Chevrolet Suburban: étape 6, image 1 de 1

    • After hooking up the wire, check to make sure the 40 amp fuse is installed for the auxiliary pin.

    • If the fuse is not installed, there will be an empty space. This fuse can be purchased at any automotive shop.

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Lauryn Johnson

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6 commentaires

This sends constant power to the trailer. What if I wanted to make that power switched by the ignition so when the key is off I can be confident that the trailer won't kill my truck battery? I know I can just unplug the trailer harness or pull this fuse to stop it, but That might be easy to forget to do.

Eric Wonderlich Jr. - Réponse

Eric, did you ever get an answer to your inquiry about killing the power to the trailer when the key is in the off position?

Bobby Burke -

It’s not a break booster, it is a brake booster. If you are going to be an author, you should know the meaning of the words you use.

Albert - Réponse

Never fails some troll somewhere..

Garry Foster -

“Words have meaning” geez Cyber Warrior. Tough talk from a distance. ?

nshourds -

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