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1990 pontiac firefly


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zatsteph 
Member - Posts: 1
Member spacespace
Joined: July 17, 2007
Location: Canada
Posted: July 17, 2007 at 6:36 PM / IP Logged  
i just bought this car (1990 pontiac firefly) and there's no deck in it.. just the wires hanging from the dash. The original factory harness has been cut out of it and i'd like to install some tunes. Just wondering if anyone has the info on what color wires are for what. Thanx.
chaos420 
Copper - Posts: 47
Copper spacespace
Joined: March 21, 2006
Location: United States
Posted: July 18, 2007 at 3:59 PM / IP Logged  
Don't know what color wires are what, but it's fairly easy to find out using a test light and a 9v battery.  There should be a 12v constant, a ground, and an accessory wire, for power.  Using a test light to every combination of pairs of wires, you can determine which which wire is your ground, which wire is hot all the time, and which wire is only hot when the key is on.  For the speaker wires, take your 9v battery and touch the two terminals to different combinations of the remaining wires, when you hear a pop in one of the speakers, you've identified one set.

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