Home Auto Repair 2005 Chevy Suburban Front Axle Will Not Disengage

2005 Chevy Suburban Front Axle Will Not Disengage

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Download Front Axle Will Not Disengage Circuit Description The front axle control circuit consists of an electric motor actuator which engages and disengages the front axle. The front axle actuator motor consists of a permanent magnetic motor, a worm gear controlled plunger, a front axle switch and an electronic control circuit all within the actuator assembly. The front axle actuator consists of the following circuits: The front axle control circuit, which is also connected to the transfer case shift control module The front axle switch circuit, which is also connected to the transfer case shift control module A battery feed circuit A ground circuit When a shift to AUTO 4WD, 4HI or 4LO is requested, the transfer case shift control module engages the front axle by grounding the front axle control circuit through a current limiting driver. Diagnostic Aids A mechanical condition inside the front axle could prevent the shift fork from moving causing the motor to be stuck in one position. Refer to Symptoms – Front Drive Axle See: Differential AssemblyTesting and InspectionSymptom Related Diagnostic ProceduresDiagnosis By Symptom – Front Drive Axle- Symptoms – Front Drive Axle