What activates interior lighting?

[fletch09]

09 TB
What activates the interior light when you open a door?
All doors except the front passenger door, when opened, activate the interior lights.
on the older cars there use to be a button,
is it now tied to the door check?

 

[TJBaker57]

09 TB
What activates the interior light when you open a door?
All doors except the front passenger door, when opened, activate the interior lights.
on the older cars there use to be a button,
is it now tied to the door check?

Most likely the BCM activates the lighting upon receipt of a status report by the PDM (pass door module) that the front passenger door has been opened. There is a switch somewhere in the passenger door that is connected to the PDM.

 

[Blckshdw]

There's 2 wiring harnesses that plug into the door latch. I'm betting one of these reads the open/closed state of the latch, reports it to the PDM, and back to the BCM.

 

[TJBaker57]

 

[fletch09]

thank you guys.
will try to look at it this week end and report back if that works.

 

[Mooseman]

More than likely the switch inside the door latch is defective.

 

[fletch09]

after the responses, I double checked the connection between the door and body, that seemed tight.
so this morning dove into taking the panel off.
as I’m doing this the, light starts working again.
I took the panel off anyway and checked all connection in door.
buttoned it back up again, light is working now.
must have been a loos connection somewhere.
thank you for the suggestions!

 

[fletch09]

well, worked yesterday, but not this morning.
must be a bad switch as Mooseman suggested.
time to get the part, tear door apart again and get it fixed.
where might that switch be located inside the door?

 

[Blckshdw]

It's part of the latch. If you follow the thread I quoted from my pic, you can see other pics from when I did my latch replacement write up.