Passenger Airbag Deactivation (PAD) Switch
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
The PAD switch is a two-position switch which requires using a key to enable or disable the passenger airbag. Each switch position has a resistor that, when selected, allows a specific amount of current to flow from the RCM to ground. The PAD switch is grounded through the RCM.