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I have a 2009 pt cruiser and my af radio for some reason will not power on unless its hard wired to the batt im using a wire harness i bought online everything is hooked up according to color but still wont turn on (without hardwire) really need some help so i can start tucking wires P.S. i do not have the model with subwoofer and it doesn't have a stock amp
 

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You need 4 things for the radio to power up.
A working radio.
12 volt source.
Switched 12 volt source.
A proper ground.
It sounds like you have 2 of those.
A ground for sure.
A working radio.
You will a digital multimeter to read the DC voltage in the harness.
Find what you are missing and then find a way to get to the radio.
 

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If you bought a standard harness it will have the accessory power wire (red), but that wire isn't present on the car harness. You just need to run that wire to a power source that turns on/off with the ignition. Dodge usually has at least one power outlet that will work.
 
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