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Old 12-22-2012, 07:39 AM   #1
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Ignition position on 2011 GMC Terrain

We use the Blue Ox Apollo brake system, when I follow owners manual and put the ignition switch in the "acc" position the power to my brake system is not there the only way so far I have been able to overcome this is by moving the position to the run position when I do that the mileage on the cars odometer registers when I am towing, I believe that to overcome this I will have to run another line that does not shut off when the switch is in the acc. position any body else have the same problem? what have you done to correct it?

Barry and Glennice, Kit and Kaboodle (Lhaso Apso's)
2008 Winnebago Tour WD, GMC Terrain toad
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Old 12-22-2012, 11:36 AM   #2
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There are 3 12volt sockets on my Silverado. One is dedicated for the cigarette lighter. The other two are for other 12 volt "plug ins". Turning the key to ACC unlocks the steering column, but may not activate all 3 sockets. Try another socket.

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Old 12-23-2012, 02:38 PM   #3
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I have the Terrains big brother, the Acadia. I have two outlets that have power with the key off and another that is switched. Have you checked other 12v outlets?

But installing a dedicated outlet for the brake system is a good idea anyway. Run it straight to the battery with a heavy gauge wire so you get all the volts and amps t needs. And use a top quality receptacle too. A lot of those ones sold in auto parts stores are pretty cheesy.
Gary Brinck
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL
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Old 12-24-2012, 05:31 AM   #4
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As others have suggested, try another 12V outlet to see if it is hot when the ignition is in ACC. The outlets on our Equinox, which is essentially the same vehicle as your Terrain, are all hot in ACC. Turning the ignition to ON will not only rack up miles, but with the ignition system hot, you will likely to also run down your battery if you have a long drive.

If all your outlets are dead with the key in ACC, one option is to rewire one of the outlets so it is hot all the time, or at least so it's hot when the key is in
ACC. Another solution is to install a dedicated outlet for the brake.
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