At the body control module (SBM) connector C1 cavity D1, inadvertent power is both an output and an input. The inadvertent power is either an output or an input, but never both. When the inadvertent power output is inactive, activating any lamp switch grounds the inadvertent power input through the lamp. As a result of the input, the SBM will activate the inadvertent power output.

The inadvertent power output supplies battery positive voltage (B+) to the lamps on CKT 1732 (ORN). Any of these lamps may drain the battery if you leave the lamps on. The SBM has a battery protection feature in order to protect the electrical system from these unwanted loads. The following 4 conditions may activate the inadvertent power output:

1. The ignition switch is in RUN.
2. The inadvertent power output is inactive and the inadvertent power input receives an active lamp input.
3. Any door opens.
4. The SBM receives an input from the remote function actuator (RFA) module.

The SBM deactivates the inadvertent power output if any lamp is active for more than 10 minutes and the ignition switch is OFF during the entire period.

The body control module (SBM) controls the function of the courtesy lamps. The IP junction block SBM fuse supplies battery positive voltage (B+) at all times to the SBM inadvertent power output. Battery positive voltage (B+) is supplied to the courtesy lamps as described above. The SBM provides a ground path to the courtesy lamps from the theatre dim-1 and the theatre dim-2 outputs . The theatre dim-1 supplies ground to the lamps on CKT 156 (WHT). The theatre dim-2 supplies ground to the lamps on CKT 157 (GRY). The SBM activates the outputs when a door is opened or the courtesy lamp switch activates. The outputs are deactivated when the SBM detects that all of the doors are closed and the courtesy lamp switches are inactive. If the outputs are deactivated because of a door closing, the outputs are deactivated with the theatre dimming function. The theatre dimming function causes the lamps to fade out gradually over a period of 3 seconds. If the outputs are deactivated by a courtesy lamp switch, the outputs are deactivated immediately without the theatre dimming function.

The body control module (SBM) activates the theatre dim-1 and theatre dim-2 outputs for 25 seconds when any door closes. The SBM activates the above outputs only if the ignition switch is off. If any other door closes during the delay period, the SBM begins counting the 25 seconds again. The outputs deactivate before the 25 seconds if the ignition switch is turned to RUN or the lock all doors switch is activated. The theatre dimming function will be performed after the 25 second period or an ignition switch input, but not after a doors lock input.

The body control module (SBM) allows the remote function actuator (RFA) module to control the interior lighting through CKT 1393 (DK BLU). When the keyless entry transmitter is used for a remote lock or a remote unlock function, the RFA activates the auxiliary lighting input on the SBM. The SBM then activates the theatre dim-1 and the theatre dim-2 outputs for up to 15 seconds. After the 15 seconds, the SBM enters the delayed illumination mode for another 25 second period. A door open input will end the auxiliary lighting mode and the SBM begins the delayed illumination mode. If the ignition switch turns to RUN, the theatre dim-1and theatre dim-2 outputs will be deactivated. The outputs also deactivate if the lock all doors switch activates. The SBM performs no other auxiliary lighting function until the input transitions from inactive to active.

The SBM activates the theatre dim-1 and theatre dim-2 outputs for 25 seconds after the driver removes the key from the ignition. The outputs deactivate when the ignition switch is placed in the RUN position. The exit lighting function deactivates when a door opens. The theatre dim-1and theatre dim-2 outputs, however, remain active because of the interior lamp control function that turns on the courtesy lamps when a door opens.

The following lamps have a switch on the ground side of the lamp:

When the inadvertent power output of the body control module (SBM) is inactive, activating a switch grounds the inadvertent power input. Activating a switch tells the SBM to activate the inadvertent power output. The inadvertent power output supplies power to the interior lamps. Any lamp with an active switch turns on.