I have a Nissan Murano 2009 LE (made in Japan for California) which came with OEM front fog lights. It doesn't have rear fog lights.
Now I want to install the rear fog light(s). I couldn't find anything in the service manual about the rear fog lights so there is no built-in harness/support for that. This means that the lights must installed from scratch.
Now, I have read the service manual, I've checked the wiring diagram for the front fog lights so basically the things look like this: - the combination switch sends the signal to the BCM which in turn sends a request signal to the IPDM which finally turns the integrated front fog lamp relay ON/OFF.
The 15A front fog lamp fuse has number #58 and is located on the IPDM on engine compartment. The IPDM has a large E345 connector which has multiple terminals. The terminals #86 and #87 are the one that supplies the 12V for the right and respectively the left front fog lights.
So to install the rear fog lights would theoretically mean to install a wire from that E345 IPDM connector (terminal #86 and/or #87 ) to the rear of the body and there to connect that new wire to the rear fog lamps. Obviously the ground is taken from the car's chassis. Now, I intend to install a LED fog lamp (at least one on the left/driver side) which uses like 3.8W (ie. about 0.3A=3.8W/12V).
The required wire length would be ~7m. The maximum Amps for an AWG18 insulated wire (ie. chassis wiring) is 16A so I think that it would be safe to use a 16A wire on a 0.3A circuit. To make sure the circuit is safe I would install a 15A fuse (by using a mini fuse holder). The wire would be inserted through a flexible cable conduit starting from the engine compartment (from the IPDM which is right in front of the driver) then following the body interior line like the all other OEM harness.
Is there anything I should be concerned of before starting to make this happen? Any hint from a car electrician?