B26 Check The Voltage To The Transfer Case Shift Motor — Active Command Cw/Ccw On; B27 Check The Voltage To The Transfer Case Shift Relays Switch Side — Circuit 704 (Dg/Lg) - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual
B26 CHECK THE VOLTAGE TO THE TRANSFER CASE SHIFT MOTOR — ACTIVE COMMAND CW/CCW ON
Transfer Case Assembly C201
B27 CHECK THE VOLTAGE TO THE TRANSFER CASE SHIFT RELAYS SWITCH SIDE — CIRCUIT 704 (DG/LG)
Transfer Case Shift Relays C221
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Measure the resistance between transfer case shift relays terminal 5 and terminal 8; and between terminal 5 and
terminal 9.
Are the resistances between 60 and 160 ohms?
Yes
REPLACE the GEM; REFER to Section 419-10. CLEAR the DTCs. TEST the system for normal operation.
No
REPLACE the transfer case shift relays. CLEAR the DTCs. TEST the system for normal operation.
NOTE: The CW/CCW active command is located in the 4-Wheel Electronic Shift active command menu.
Set the active command CW/CCW to ON.
Measure the voltage between transfer case assembly C201-14, circuit 778 (O), and ground; and between transfer
case assembly C201-15, circuit 777 (Y), and ground.
Are the voltages greater than 10 volts?
Yes
GO to B28.
No
GO to B27.
Measure the voltage between transfer case shift relays C221-3, circuit 704 (DG/LG), and ground.
Is the voltage greater than 10 volts?
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8/30/2010