Is any voltage present?
K11 CHECK FOR CORRECT SJB OPERATION
Disconnect all the SJB connectors.
Check for:
corrosion
damaged pins
pushed-out pins
Connect all the SJB connectors and make sure they seat correctly.
Operate the system and verify the concern is still present.
Is the concern still present?
Yes
INSTALL a new SJB. REFER to Section 419-10. TEST the
system for normal operation.
No
The system is operating correctly at this time. The concern
may have been caused by a loose or corroded connector.
2007 Ranger Workshop Manual
http://www.fordtechservice.dealerconnection.com/pubs/content/~WS7L/~MUS~LEN/20/S