Where are the door ajar sensors on a 2002 ford ranger?

The door ajar sensors on a 2002 Ford Ranger are located in the door jambs, on each door (driver's side, passenger's side, and rear doors if applicable). They're small switches that are activated when the door is closed, completing a circuit. You'll have to look closely in the jamb area where the door closes – they're usually small and somewhat hidden. They might be black or a similar inconspicuous color.