Chrysler Grand Voyager 1999 - Electric Problems. - jonah53

Hi, the electrics on the above have played up for sometime now. The interior lights, folding mirrors, central locking, radio, all do not work unless the ignition is on, with the exception of the radio which doesn't work at all. The other little quirky thing is, if i leave the headlights on and remove the keys, the lights don't go out and i can't unlock the door again. Anybody have any ideas, and how to fix it.? Thanks in advance.