I am stumped on this one. Here are the details:
When opening the driver door, the courtesy lamps do not come on. The
drivers power seat will not work either. When you turn the key on, the
power seat will work, but the courtesy lamps still won't light when
drivers door opens.
With the key off but in ignition, open the driver door and the buzzer
sounds. Leave on the lights and open the door, the buzzer sounds.
If you open the passenger door with the key off, the courtesy lights all
come on. The drivers power seat as well as the passenger power seat now
work, as long as the door passenger door is open.
I checked for voltage at the drivers door switch. There was none. I
traced the wire from the door switch to the buzzer. The wire is good. I
suspect the buzzer module has failed, but before I spend 80 bucks for
one, I wanted to see if anyone had any ideas.