Yes
REPAIR circuit 770 (W). CLEAR the DTCs. CYCLE the ignition OFF then ON. TEST the
system for normal operation.
No
REPLACE the GEM; REFER to
Section 419-10
. CLEAR the DTCs. TEST the system for
normal operation.
B44
MONITOR THE GEM PID PLATE_C FOR OPEN
Monitor the GEM PID PLATE_C.
Does the GEM PID PLATE_C not indicate OPEN?
Yes
GO to
B46
.
No
GO to
B45
.
B45
CHECK CIRCUIT 764 (BR/W) TO THE CONTACT PLATE SWITCH C — MONITOR THE GEM PID PLATE_C
Connect a jumper wire between transfer case assembly C201-9, circuit 764 (BR/W), and
C201-10, circuit 762 (Y/W).
Monitor the GEM PID PLATE_C.
Does the GEM PID PLATE_C indicate CLOSED?
Yes
REMOVE the jumper wire; GO to
B49
.
No
GO to
B47
.
B46
CHECK CIRCUIT 764 (BR/W) FOR SHORT TO GROUND
GEM C241
Measure the resistance between GEM C241-19, circuit 764 (BR/W), and ground.
Is the resistance greater than 10,000 ohms?
Yes
REPLACE the GEM; REFER to
Section 419-10
. CLEAR the DTCs. TEST the system for
Page 47 of 74
1998 F-150/250 Workshop Manual
1/11/2011
http://www.fordtechservice.dealerconnection.com/pubs/con...
