[don_1]

Coutesy lights, interior lights etc. in car do not turn off after doors are closed. What controls these?

[KBC]

On our's there is not only a dome light dimmer switch but also a dome light bypass button.Perhaps you have the bypass depressed and/or the dome light dimmer switch set to 'on' all the time,check those.

[kitch428]

What causes the delay is called a capacitor. Stored current that slowly releases.
Today's cars now have a BCM (body control module).

[Stratmando]

Here is 1 circuit:
Vehicle Interior Lighting With Switch-Off Delay Circuit Diagram

[TxGreaseMonkey]

In the diagram, C1 is the capacitor that kitch428 referred to.

[Stratmando]

Actually a Large capacitor across an LED by itself, can work. The additional components allow it to handle a larger load without draing down the capacitor.

[don_1]

On our's there is not only a dome light dimmer switch but also a dome light bypass button.Perhaps you have the bypass depressed and/or the dome light dimmer switch set to 'on' all the time,check those.

I had checked that,but thank you.

[Stratmando]

You could have a bad door switch.
I had a friend who had a Navigator and the interior lights stayed on, it didn't have pin switches, they were concealed in the door. It woud have been hard to determine as the light stayed on. I rolled down the windows and opened each door, and each but 1 had a small chime, the one that didn't was the bad door switch?

[Stratmando]

Your sentence cut off.
Even though on this vehicle lights don't go out till all door are closed, each individual door chimes individually, even though another door is open.

[don_1]

Biua

[Stratmando]

Biua? Buss Interface Unit, Audio?
What is BIUA?