I am new to 1993 164l...1) control unit - rear right "door open" light stays on when door is closed. 2) climate control panel - when air is "off", a pulsating sound is made from apparently the back of the unit as if trying to start up a motor or something. 3) courtesy lights - when are the courtesy lights supposed to come on? Mine don't come on when door is opened before or after ignition. They come on only when the engine is started.