By using a feature called inadvertent power control, the
body control module (BCM) supplies power to all of the following components:
• | The rear view mirror reading lamps |
• | The instrument panel compartment lamp |
• | The rear compartment lamp |
The left front door ajar switch turns the interior lamps on through
the BCM by grounding CKT 394. When the left front door is open, the
switch is closed. This condition provides a ground and a door open input to
the BCM. The BCM then grounds the following lamps through CKT 156 in order
to turn the lamps on:
• | The rearview mirror lamps |
The right front door ajar switch and the rear door ajar switches turn
the interior lamps on by grounding CKT 395 from the BCM.
When the ignition key is removed from the lock cylinder, the interior
lamps remain on for approximately 40 seconds.
The BCM provides an interior lamps-on delay after a door is opened.
The lamps remain on for approximately 40 seconds or until the ignition
switch is turned to the ON position. The 40 second lamps-on delay reduces
to 4 seconds if a door is opened within 2 minutes of the ignition
switch being moved from the ON position. The interior lamps immediately turn
off when the vehicle begins to move.
The dome lamp OFF-DOOR-ON switch controls the dome lamp. When the switch
is in the OFF position, the dome lamp remains off. When the switch is in the
DOOR position, the dome lamp lights when a door is opened by the BCM grounding
CKT 156. When the switch is in the ON position, ground is supplied
through CKT 750. The rear view mirror reading lamps are controlled
by the rear view mirror reading lamps switch or through CKT 156 from the BCM.
Voltage is supplied at all times to the BCM through the INT LPS fuse.
The BCM supplies voltage to the interior lamps through CKT 1732.
Battery Run Down Protection
When the ignition switch is in the OFF position, the BCM turns off the
power to all of the interior lamps after 18-22 minutes.
The BCM will reset the inadvertent power control relay output when one
of the following actions is performed:
• | Turn the ignition switch to the ON position. |
• | Turn off any interior lamps that may be on. |
• | Press the power door lock switch/keyfob button. |
• | Press the decklid release keyfob button. |