B12 Check Circuit 682 (Db) For Short To Power; B13 Check The Front Axle Engagement; B14 Check The Front Driveshaft Engagement - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

B12 CHECK CIRCUIT 682 (DB) FOR SHORT TO POWER

B13 CHECK THE FRONT AXLE ENGAGEMENT

B14 CHECK THE FRONT DRIVESHAFT ENGAGEMENT

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Is the resistance less than 5 ohms?
Yes
GO to B12.
No
REPLACE circuit 682 (DB). CLEAR the DTCs. TEST the system for normal operation.
Measure the voltage between mode switch C230-2, circuit 682 (DB), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 682 (DB). CLEAR the DTCs. TEST the system for normal operation.
No
REPLACE the GEM; REFER to Section 419-10. CLEAR the DTCs. TEST the system for normal operation.
Set the active commands AXLE ENGG to ON and AXLE DSCN to OFF.
Drive a short distance.
Raise and support the vehicle with the engine running; refer to
Spin one front tire. The other tire should spin in the opposite direction.
Is the axle working properly?
Yes
EXIT the active command mode and GO to B14
No
LOWER the vehicle; GO to Pinpoint Test D.
Place the mode switch in the 4H position.
Section 100-02.
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8/30/2010