Normally red. Check the wires with a volt meter to be sure.
power is red ground is black
red
blue and yellow
Don't know the color of the wire but you will just have to use a test light to see what wire is hot to the radio.
You likely do not have the "Constant Power" wire connected at the back of your radio deck, it is often yellow in color.
The constant power wire for the radio in a 1990 Ford Thunderbird should be green/yellow. The ground wire for this vehicle's stereo system should be black/light green.
what are the radio color codes for a2009 chevy impala
You have to go to the Power Plant and return power to the Radio Station.
what is the color coding for the radio in a 1992 ford 150 van
WHAT ARE"89-NISSAN MAXIMA RADIO WIRE COLOR CODES
What is the radio wiring color code for a 2008 Chevy silverado
If the display is not on when you turn the ignition on. First you check the fuses. radio memory is usually run with the courtesy light fuse. The main radio fuse is marked radio. Second you pull the radio out and test the power leads to the radio. If you have no power then there may be a short in a wire. If there is power on the power leads then the radio must be replaced.