B23 Check Circuit 782 (Br/W) For Short To Power; B24 Check Circuit 781 (O/Lb) For Short To Power; B25 Check The Transfer Case Shift Relays Coils - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

B23 CHECK CIRCUIT 782 (BR/W) FOR SHORT TO POWER

Transfer Case Shift Relays Module C221
GEM C241

B24 CHECK CIRCUIT 781 (O/LB) FOR SHORT TO POWER

B25 CHECK THE TRANSFER CASE SHIFT RELAYS COILS

http://www.fordtechservice.dealerconnection.com/pubs/content/~WSWJ/~MUS~LEN/21/...
Are the resistances greater than 10,000 ohms?
Yes
GO to B25.
No
REPAIR circuit 781 (O/LB) and/or circuit 782 (BR/W). CLEAR the DTCs. TEST the system for normal operation.
Measure the voltage between transfer case shift relays C221-8, circuit 782 (BR/W), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 782 (BR/W). CLEAR the DTCs. TEST the system for normal operation.
No
GO to B24.
Measure the voltage between transfer case shift relays C221-9, circuit 781 (O/LB), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 781 (O/LB). CLEAR the DTCs. TEST the system for normal operation.
No
GO to B25.
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8/30/2010