Have a 1990 NA with an annoying key buzzer issue. With the key removed from the ignition switch the buzzer comes on anyway when a door is open and stays on until the door is closed. I replaced the ignition switch and got the same results. I also removed the fuse in position N and that stops the buzzer. Does anybody have a way of isolating the problem and repairing it to original where the buzzer goes off with the key out of th ignition?