I removed the factory deck from my 2003 chevy venture and installed an aftermarket deck with the proper wiring connectors with the suggested interface. But the radio can be turned on without the key in the ignition. I re-installed the factory deck and saw that it was the same thing. Will this drain the battery faster in cold weather or is their something else wrong?
Yes the battery can be effected (drain) but in any kind of weather, unless you turn the radio off when you turn the engine off. The power wire in either application is connected directly to the battery as opposed to being connected to the ACC terminal which will be switched on and off with the ignition. You should connect the power wire (should be RED in color) from the radio plug to the terminal (marked "acc") on your fuse box located somewhere under your dash board. It sounds as though it's possible that the RED power wire and the YELLOW "Memory" wire have been switched, the power wire should be switched with the ignition and the Memory wire should be connected directly to a Battery terminal (marked as Batt also on the fuse box) or to the battery itself. All of these wires should be labeled with a small tab indicating there connection. Example Red wire marked (+ poss power), Black wire (- Neg Ground) Yellow wire (Memory) and usually 2 Green, 2Grey, 2 Blue, 2Purple as for the Speakers Poss. & Neg. respectively.
SOURCE: aftermarket radio installation without plugs
go to walmart and get your pig tail plugs. they will plug directly into your truck harness. all you have to do is splice the connectors to the radio.
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also wondering if the stereos anti theft system could be causing the problem as when I open the door the factory stereo turns off, where as the aftermarket stereo turns on as soon as it's plugged into the system.
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