C29 Check Circuit 771 (P/Y) For Short To Power; C30 Check Circuit 762 (Y/W) For Short To Power; C31 Check Circuit 762 (Y/W) For Open - Ford Expedition 1998 Workshop Manual

1998 Expedition/Navigator Workshop Manual

C29 CHECK CIRCUIT 771 (P/Y) FOR SHORT TO POWER

GEM C241

C30 CHECK CIRCUIT 762 (Y/W) FOR SHORT TO POWER

Transfer Case Assembly C201

C31 CHECK CIRCUIT 762 (Y/W) FOR OPEN

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Is the resistance less than 5 ohms?
Yes
GO to C29.
No
REPAIR circuit 771 (P/Y). CLEAR the DTCs. TEST the system for normal operation.
Measure the voltage between transfer case assembly C201-5, circuit 771 (P/Y), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 771 (P/Y). CLEAR the DTCs. CYCLE the ignition to OFF, then ON. TEST the system for normal
operation.
No
GO to C30.
Measure the voltage between GEM C241-12, circuit 762 (Y/W), and ground.
Is any voltage indicated?
Yes
REPAIR circuit 762 (Y/W). CLEAR the DTCs. CYCLE the ignition to OFF, then ON. TEST the system for normal
operation.
No
GO to C31.
Measure the resistance between transfer case assembly C201-10, circuit 762 (Y/W), and GEM C241-12, circuit
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8/30/2010