How Can I find the wiring diagram For the sound system in a 1991 Plymouth Acclaim? It is not in the owners man

You could try going to a Plymouth dealer ship and asking to see the wiring diagram they may or may not let you. Otherwise my library in town has Chilson manuals you could check there and that would deffinitely have it. I had a plymouth neon match up the colors that have two wires one neg one positive(solid grey w/ solid grey, gray w/ black stripe to gray w/ black stripe etc..) Yellow is battery, red is ignition or remote turn on, black is ground,orange is illumination.