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Possible Causes

Possible Causes 
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(K504) DRIVETRAIN 5 VOLT SUPPLY CIRCUIT SHORTED OPEN
(K977) MODE SELECT CIRCUIT SHORTED TO GROUND
(K977) MODE SELECT CIRCUIT SHORT OPEN
TRANSFER CASE SELECTOR SWITCH
FINAL DRIVE CONTROL MODULE
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