Trailer Power Supply Operation

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

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

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

Through 10A fuse (No. 38, located in the IPDM E/R)
Through IPDM E/R terminal 27
To trailer tow relay 2 terminal 1 and
To backup lamp relay terminal 3 (with M/T).
When energized, trailer tow relay 2 power is supplied
Through trailer tow relay 2 terminals 5 and 7
To trailer connector terminal 5.