A bad starter usually manifests itself in symptoms such as smoke, vehicle failing to start, grinding noises, or freewheeling. Visit a professional mechanic to repair and replace the starter if you note these signs.What are the differences between a relay and solenoid?
A relay and a solenoid do two very different jobs. A relay is in essence a switch with two positions, on and off. A solenoid, meanwhile, enables mechanical components to physically move and change position, for example, a starter motor engaging a flywheel.What does a starter solenoid relay do?
A starter relay, or starter solenoid, works by completing the circuit that brings electric current from a vehicle's battery to the starter motor of the engine. The starter relay can typically be located by following the red wire from the battery to the relay.What does a bad starter solenoid sound like?
According to Popular Mechanics, a bad starter motor makes either a clicking sound or a high-pitched screeching noise when the ignition key is turned.