If only one wire ever had power in this step it is the.
Blue white wire alpine.
If there is no ground wire you can secure the ground cable to bare metal in the body of the car to serve as a ground.
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The 12 volt constant power wire is usually yellow or blue though it may be a number of colors coming from the car.
The wire that shows less than 12v at that point is the dimmer illumination wire.
In this video we go over what the wire colors are on an alpine video head unit plug.
The ground wire for the stereo will be black as will its corresponding wire from the car.
For alpine clarion jvc pioneer sony or valor radios connect the swi rc 1 8 plug into the radio s steering wheel input jack on back of radio or wire harness.
That blue wire coming out of the back of your receiver is a remote wire so that when you run an amplifier your receiver will send a signal through that blue wire and tell the amp to turn on and stay on.
The wire that still shows 12v is the accessory wire which is usually red in aftermarket wiring harnesses.
The radio am antenna is that big long metal plug that goes.
I already had a wire harness hooked up from my previous unit i installed so i spliced right in using the harness that came with the radio.
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For kenwood or oem radios connect the blue yel wire to the remote input wire blue yel or yel blu for kenwood gray for oem of radio.
Blue w white stripe using a head unit harness adapter although most aftermarket head units follow the above coloring scheme and it s possible to figure out what the oem wires in your car are all for without a wiring diagram installing an aftermarket head unit is much easier if you have a harness adapter.
Do not connect the blue white wire to the orange wire.
Most aftermarket head units usually use an orange wire or an orange wire with a white stripe for this.
Simply connect another piece of blue primary wire to the blue wire in the wiring harness and run the primary wire back to the amplifier to terminate in.
An aftermarket head unit typically has a clearly marked blue white wire included in the wiring harness.