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

Test 1-6:




Test 7-10:






Symptom:
CAB POWER FEED CIRCUIT

When Monitored and Set Condition:
CAB POWER FEED CIRCUIT

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
FUSE BLOWN - FUSED B(+) CIRCUIT
FUSED B(+) CIRCUIT OPEN
FUSED B(+) CIRCUIT SHORTED TO GROUND
FUSED B(+) CIRCUIT INTERMITTENTLY SHORTED TO GROUND
CAB DEFECTIVE - FUSED B(+) CIRCUIT OPEN
CAB DEFECTIVE - FUSED B(+) CIRCUIT SHORTED TO GROUND