Trailer Power Supply Operation

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

The trailer power supply is controlled by the trailer tow relay 2.

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

Through 10A fuse (No. 51, located in the IPDM E/R)
Through IPDM E/R terminal 16
To trailer tow relay 2 terminal 1.
When energized, the trailer tow relay 2 supplies power
Through trailer tow relay 2 terminals 5 and 7
To trailer connector terminal 5.