2002 Ford Ranger
3.0l V6

Engine warning lamp is [on].  I tried two OBD-II readers, neither
seemed to recognize they were plugged in to the connector, (under
the dash, driver's side)

According to an OBD-II schematic I located, pin #16 should show 12v.
Although I don't know if this is a requirement for the readers.

I checked pin #16 with my voltage tester, and it read nothing - no
voltage. Checked with engine running, engine off, and ignition switch
to [on].

Any ideas on this?  Bad connector?  If so could I jumper 12v to pin
#16
in order to get the reader to work?

Thanks.