Heater
 

I Have a 1989 300 se.i replaced the radiator back in the summer because it was running hot.this stop that but now the heater just blows cold air when moving.If i start it and dont move it gets hot but when i go down the road it turns cold.i asked a friend about this and he said i may have knock off a vacuum line.do you know where i can get a diagram of the vacuum Or anything you may think of.Thank You
Larry