Circuit/System Description
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
Voltage is applied to the body control module (BCM) from the INT LPS fuse. The BCM then applies voltage to the following lamps:
-V4U Base Vehicle
- Instrument panel (I/P) compartment lamp
- LED interior lamps control module
- Rear compartment lamp
- Vanity mirror lamps
+V4U Limousine
- I/P compartment lamp
- Rear compartment lamp
- Vanity mirror lamps
+V4U/B9Q Hearse
- I/P compartment lamp
- Overhead console lamps
- Overhead lamp relay
- Rear compartment lamp
- Rear roof rail lamps
- Vanity mirror lamps
In the event that any of these lamps were to remain illuminated for more the 20 minutes with the ignition switch in the OFF position, the BCM will deactivate the inadvertent power courtesy lamps circuit to prevent total battery discharge.