Power Supply And Ground

WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

Power is supplied at all times

through 15A fuse [No. 19, located in the fuse block (J/B)]
to key switch terminal 1
through 15A fuse [No. 3, located in the fuse block (J/B)]
to BCM (body control module) terminal 42
through 50A fusible link (letter j , located in the fuse and fusible link box)
to BCM (body control module) terminal 55.

When the key is inserted in key switch, power is supplied

through the key switch terminal 2
to BCM (body control module) terminal 37.

With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 16, located in the fuse block (J/B)]
to BCM (body control module) terminal 38.

Ground is supplied

to BCM (body control module) terminals 49 and 52
through grounds terminals M57, M61 and M79.

When the driver side door is opened, ground is supplied

through case ground of front door switch LH
to BCM (body control module) terminal 62.

When the passenger side door is opened, ground is supplied

through case ground of front door switch RH
to BCM (body control module) terminal 12.

When the sliding door LH is opened, ground is supplied

through case ground of sliding door switch LH
to BCM (body control module) terminal 63.

When the sliding door RH is opened, ground is supplied

through case ground of sliding door switch RH
to BCM (body control module) terminal 13.

When the liftgate is opened, ground is supplied

to BCM (body control module) terminal 58.
through back door switch terminal 3 (without back door auto closure system) or terminal 8 (with back door auto closure system)
to grounds terminals D403 and D404.

When the driver or passenger side door is unlocked by the door lock and unlock switch, BCM (body control module) receives a ground signal

through grounds terminals M57, M61 and M79
to main power window and door lock/unlock switch terminal 14 (with rear power vent windows) or terminal 12 (without rear power vent windows) and door lock/unlock switch RH terminal 16
to BCM (body control module) terminal 22.

When the driver side door is unlocked by the key, the BCM (body control module) receives a ground signal

through grounds M57, M61 and M79
to front door key cylinder switch LH terminal 5
from front door key cylinder switch LH terminal 1
to main power window and door lock/unlock switch terminal 4
from main power window and door lock/unlock switch terminal 14 (with rear power vent windows) or terminal 12 (without rear power vent windows)
to BCM (body control module) terminal 22.

When a signal, or combination of signals is received by BCM (body control module), ground is supplied

through BCM (body control module) terminal 48
to lamps on demand switch terminal 3
through lamps on demand switch terminal 4
to interior room/map lamps terminal 2 and
to personal lamps terminal 2 (without rear roof console assembly) or terminal 3 (with rear roof console assembly).

With power and ground supplied, the lamps illuminate.