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Blaupunkt Sacramento


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one92rs 
Member - Posts: 32
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Joined: January 03, 2010
Location: Texas, United States
Posted: November 22, 2017 at 7:13 PM / IP Logged Link to Post Post Reply Quote one92rs
2003 GMC sierra base model. No onstar at all. I just purchased a Blaupunkt 290MC 6.1 screen stereo. To me the wiring diagram is very vauge in the instructions. 1st-the park brake wire. it does not specify positive or negative. 2nd-key3 and key4 wire. i dont understand what these are for unless they are to power the back up camera or another add on.
i am an idiot 
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Joined: September 21, 2006
Location: Louisiana, United States
Posted: November 23, 2017 at 7:16 AM / IP Logged Link to Post Post Reply Quote i am an idiot
All parking brake wires are negative. I have no idea about the other 2 wires.

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