Two possible causes of the starter failing to disengage - either the starter is seizing internally or the solenoid is remaining energised - checking for a supply to the solenoid when the key is turned off will provide the necessary information - whether to investigate the circuit or whether to remove the starter and service.
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Two possible causes of the starter failing to disengage - either the starter is seizing internally or the solenoid is remaining energised - checking for a supply to the solenoid when the key is turned off will provide the necessary information - whether to investigate the circuit or whether to remove the starter and service.