B36 Check Circuit 771 (P/Y) To The Contact Plate Switch A; B37 Check Circuit 771 (P/Y) For Short To Ground; B38 Check Circuit 771 (P/Y) For Open - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

B36 CHECK CIRCUIT 771 (P/Y) TO THE CONTACT PLATE SWITCH A

B37 CHECK CIRCUIT 771 (P/Y) FOR SHORT TO GROUND

GEM C241

B38 CHECK CIRCUIT 771 (P/Y) FOR OPEN

http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/...
Yes
GO to B37.
No
GO to B36.
Connect a jumper wire between transfer case assembly C201-10, circuit 762 (Y/W) and C201-5 circuit 771 (P/Y).
Monitor the PID PLATE_A.
Does the PID PLATE_A indicate CLOSED?
Yes
GO to B42.
No
GO to B38.
Measure the resistance between transfer case assembly C201-5, circuit 771 (P/Y), 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 normal operation.
No
REPAIR circuit 771 (P/Y). CLEAR the DTCs. CYCLE the ignition switch to OFF, then ON. TEST the system for
normal operation.
Measure the resistance between transfer case assembly C201-5, circuit 771 (P/Y), and GEM C241-21, circuit 771
(P/Y).
Is the resistance less than 5 ohms?
Yes
GO to B39.
Page 30 of 64
8/30/2010