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accessory wire on new gm vehicles.


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squeakerman3c 
Member - Posts: 6
Member spacespace
Joined: January 03, 2009
Location: Texas, United States
Posted: September 23, 2010 at 11:14 AM / IP Logged  
hey there guys, i need a little help here. im having trouble with all the new GM vehicles. i connect atleast 5 systems a week on GM vehicles 07+. everyone for some reason wants to stay with the factory deck cuz in reality no one wants to pay $140-160 for a wire harness. the only problem i have is that these vehicles dont have an accessory wire. i already used a pac SOEMT line output converter with a remote wire but it doesnt help. the amp stays on for a bit when the vehicle is turned off and then a couple of seconds later theres a loud thumping noise for a couple of seconds. i understand its because of the retain accessory. later i found that by the foot brake, there is a switched accessory at the fuse box. i was happy to find that so i called all my customers back and re did there remote wire to that fuse box. well yesterday one customer came back saying that his truck literally stays on until the door opens. i understand the radio stays on but not the truck. the guy literally turned the truck off, took out the key and the truck was still running. he opened the door and the motor shut off. thats wierd. so can anyone please help me out here. thanks in advance.
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i am an idiot 
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: September 23, 2010 at 7:28 PM / IP Logged  
Have you tried tapping the 10 amp fuse in the top left corner of the fusebox mounted on the left end of the dash?
squeakerman3c 
Member - Posts: 6
Member spacespace
Joined: January 03, 2009
Location: Texas, United States
Posted: September 23, 2010 at 7:49 PM / IP Logged  
they are all constant. none are switched accessory!
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Ween 
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Platinum spacespace
Joined: August 01, 2004
Location: Illinois, United States
Posted: September 23, 2010 at 8:08 PM / IP Logged  
hi,
any particular gm vehicles you are referring to?
squeakerman3c 
Member - Posts: 6
Member spacespace
Joined: January 03, 2009
Location: Texas, United States
Posted: September 23, 2010 at 8:10 PM / IP Logged  
pretty much all the 07+ silverado/sierras and escalades. 09+ camaro, impalas and any other gm vehicle that would use an PAC OS2, OS3 and OS4.
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zerepdivad 
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Joined: July 03, 2006
Location: Wisconsin, United States
Posted: September 24, 2010 at 11:39 PM / IP Logged  
pink wire at the brake pedal.
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Steven Kephart 
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Platinum spaceThis member has been recognized as an authority in Mobile Audio and Video. Click here for more info.spaceThis member consistently provides reliable informationspace
Joined: November 06, 2003
Location: Oregon, United States
Posted: September 25, 2010 at 1:30 AM / IP Logged  
There should be a brown wire in the ignition harness that is an accessory. It isn't high power, so you would need to use a relay to use it as a power source. But for an amp turn-on it should work fine.

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