FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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CAB Power Feed Circuit











Symptom:
CAB POWER FEED

When Monitored and Set Condition:
CAB POWER FEED

When Monitored: Ignition on. The CAB monitors the Fused B (+) circuit at all times for proper system voltage.

Set Condition: If the Fused B (+) voltage is missing when the CAB detects that an internal main driver is not "on", the Diagnostic Trouble Code (DTC) is set.

POSSIBLE CAUSES
INTERMITTENT DTC
BLOWN FUSE - FUSED B (+) CIRCUIT
NO B+ SUPPLY TO FUSE
FUSED B (+) CIRCUIT OPEN
FUSED B (+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND
FUSED B (+) CIRCUIT SHORTED TO GROUND
CAB - FUSED B (+) CIRCUIT OPEN
CAB - FUSED B (+) CIRCUIT SHORTED TO GROUND