red
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.
She joined "Grand Ole Opry" in 1986 radio shows
The molding around your radio pops off, you may need to pry in the cornors. take out the 4 screws that hold in the radio, pull out radio disconnect the antenna, power, than plug back in the new one, replace molding.
I need the color coding for my 1995 Toyota T100 radio harness to facilitate the installation of an after market radio.
Clarion
power is red ground is black
The Pontiac Grand Prix goes by the GM Factory Wire Harness Color Codes. http://www.installdr.com/harnesses/GM-Wiring.pdf
Blown fuse.
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.
Normally red. Check the wires with a volt meter to be sure.
remove radio from a grand marquis 2003
Loose wire?
The radio fuse would be under the steering column and the relay would be under the hood in the PDC (Power Distribution Center.)
You likely do not have the "Constant Power" wire connected at the back of your radio deck, it is often yellow in color.
how to fix the light for the clock radio in a 2003 Pontiac grand am
Use a sledge hammer. Mine goes out to lunch for 2 days after any battery disconnect.