Ford Ranger Owner's Manual page 108

Seats
The heated seat will only operate with the
ignition switched on.
The maximum temperature is reached
after five or six minutes. It is regulated
thermostatically.
The heated seat will remain on until either
the heated seat switch or the ignition is
switched off.
E131536
Adjust the control to the desired heat
setting.
106
Ranger (), EB3B-19G219-ZAB enAUS