Maybe this FRONT FOG LAMPwill help
I am not sure what all this means, but it is straight from the service manual..
FRONT FOG LAMP
FRONT FOG LAMP PFP:26150
System Description AKS005P3
Control of the fog lamps is dependent upon the position of the combination switch (lighting switch). The lighting
switch must be in the 2ND position or AUTO position (LOW beam is ON) for front fog lamp operation.When
the lighting switch is placed in the fog lamp position the BCM (body control module) receives input signal
requesting the fog lamps to illuminate. When the headlamps are illuminated, this input signal is communicated
to the IPDM E/R (intelligent power distribution module engine room) across the CAN communication lines. The
central processing unit of the IPDM E/R controls the front fog lamp relay coil. When activated, this relay directs
power to the front fog lamps.
OUTLINE
Power is supplied at all times
through 15A fuse [No. 72, located in the IPDM E/R (intelligent power distribution module engine room)]
to front fog lamp relay, located in the IPDM E/R (intelligent power distribution module engine room), and
through 15A fuse [No. 73, located in the IPDM E/R (intelligent power distribution module engine room)]
to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
Power is also supplied at all times
through 50A fusible link (letter F, located in the fuse and fusible link box)
to BCM (body control module) terminal 7
When the ignition switch is in ON or START position, power is supplied
through 10A fuse [No. 1, located in the fuse block (J/B)]
to BCM (body control module) terminal 35
through 10A fuse [No. 80, located in the IPDM E/R (intelligent power distribution module engine room)]
to CPU (central processing unit) in the IPDM E/R (intelligent power distribution module engine room)
When the ignition switch is in ACC or ON position, power is supplied
through 10A fuse [No. 6, located in the fuse block (J/B)]
to BCM (body control module) terminal 36
Ground is supplied
to BCM (body control module) terminal 8
through grounds E13, E26 and E28
to IPDM E/R (intelligent power distribution module engine room) terminal 14 and 45
through grounds E13, E26 and E28.
FOG LAMP OPERATION
The fog lamp switch is built into the combination switch. The lighting switch must be in the 2ND position or
AUTO position (LOW beam is ON) and the fog lamp switch must be ON for fog lamp operation.
With the fog lamp switch in the ON position, the CPU (central processing unit) of the IPDM E/R (intelligent
power distribution module engine room) grounds the coil side of the fog lamp relay. The fog lamp relay then
directs power
through IPDM E/R terminal 32
to front fog lamp LH terminal 1
through IPDM E/R terminal 29
to front fog lamp RH terminal 1
Ground is supplied
to front fog lamp LH terminal 2
through grounds E13, E26 and E28, and
to front fog lamp RH terminal 2
through grounds E13, E26 and E28.
With power and grounds supplied, the front fog lamps illuminate.
FRONT FOG LAMP
COMBINATION SWITCH READING FUNCTION
Refer to LT-253, "Combination Switch Reading Function" .