That depends.
There should be two red power wires on the back of an aftermarket deck. One will be 'constant' power, the other will be 'switched' power.
The 'constant' one always has power, so that radio stations and other settings aren't erased when the vehicle is turned off.
I'm assuming you're not using an adapter harness to connect the aftermarket deck directly to the GM radio harness.(always the preferable option)
Most of the time(when not using an adapter harness) I will locate a pre-existing wire in the dash that is 'constant', and tap into that for the 'constant'.
The 'switched' power can be connected to the factory radio's 'switched' power source. You'll have to figure out which wire that is in the GM harness and connect to that, or (not so ideally) cut that wire and connect it to the deck.
The RCA's from the amp will be arn to the CD player, then you need to connect the speaker's wire to the output + and - of the amp, this will cause the amp to have musical power from your radio, and the speakers to have the power from the amp..-Shocker
you have to power the remote wire, splice it into the power wire, it came with a factory amp. had the same problem.
if you are using an aftermarket wiring harness hook up the remote turn on wire on the new radio it should be blue with a white stripe to the harness also has a blue and white stripe and plug it in this wire turns on the factory amplifier if you are not using a harness you will have to locate the internal amplifier wire of the radio and connect that to the remote turn on on the aftermarket radio = answer = the inernal apm power wire is white on the black wire harness ANSWER if you dont want to use the factory amp. just run new speaker wires to each speaker.
that wire is for the radio dimmer. when you turn on your headlights the radio dims so your not blinded at night. Some aftermarket stereos have a place to hook this wire up and some don't.
Your head unit should have a wire marked as P. Antenna that's the wire you need to connect.
Which wire is the power
The RCA's from the amp will be arn to the CD player, then you need to connect the speaker's wire to the output + and - of the amp, this will cause the amp to have musical power from your radio, and the speakers to have the power from the amp..-Shocker
you have to power the remote wire, splice it into the power wire, it came with a factory amp. had the same problem.
You have to go purchase an aftermarket wiring harness. that will plug into the factory harness then you can wire it to the aftermarket radio.
on the 2006 models of the ford fusion. the radio antenna is embedded in the back glass with the rear defrosters. It's important to know that when installing aftermarket radio you should connect pin 5 on the radio harness to a switched 12v source. If not done this will cause problems with radio reception! pin 5 is the antenna's booster power wire and was originally powered off of the stock radio but the aftermarket radios do no supply this power source. I reccommend using a relay and the remote antenna wire and 12v constant wires off the new radio harness to make this connection! this will allow the the remote wire to switch the relay on and off when the radio powers on, and connect the the tapped 12v constant wire to the antenna booster power! thats how i would do it!
if you are talking about an aftermarket radio's amp turn on wire then without an amp you can just cap it off. if the harness used to connect to new radio to your factory wires has a blue antenna/factory amp then you can connect it to that provided the new radio doesnt have a second blue wire for that purpose.
What it is, is your power ant. wire is hooked to your remote(control) wire of the Amp.To fix this disconnect it and connect it to the remote(control) wire. If you dont have a output labeled as this connect it to the hot wire for the radio. (do not connect it the the constant hot wire there will be two different wires)
if you are using an aftermarket wiring harness hook up the remote turn on wire on the new radio it should be blue with a white stripe to the harness also has a blue and white stripe and plug it in this wire turns on the factory amplifier if you are not using a harness you will have to locate the internal amplifier wire of the radio and connect that to the remote turn on on the aftermarket radio = answer = the inernal apm power wire is white on the black wire harness ANSWER if you dont want to use the factory amp. just run new speaker wires to each speaker.
that wire is for the radio dimmer. when you turn on your headlights the radio dims so your not blinded at night. Some aftermarket stereos have a place to hook this wire up and some don't.
there is no accesory switch wire on the 02 malibu.....you must run your accessory wire from your aftermarket radio to the thick brown wire coming out of the ignition to the left of the radio bay and put a fuse in the wire close to where you tapped into the brown wire on the wire from your radio also your door chimes will work again
Your head unit should have a wire marked as P. Antenna that's the wire you need to connect.
Don't connect the red wire or you will die.