It is important to ensure that the vehicle's shifter is in neutral or park (automatic) or the clutch is depressed (standard) if the starterdoes not turn at all after the ignition switch has been operated. Make sure that the battery has sufficient charge and that both battery and starter solenoid terminals have tight cables. If the engine fails to crank while the starter spins, it probably means that there is a slipping overrunning clutch within the starter. This necessitates removing this apparatus from its place of attachment, for then only will it be possible to replace it. In case when you press on the key but the starter does not work while solenoid gives a click sound, there are three causes of these problems which lie either in battery, main solenoid contacts or ignition switch itself. Caution: before inspecting start problems ensure that battery is fully charged. When activating switch does not create any sound of plunger moving up then something must be wrong with the solenoid itself or circuit is opened. Connect a jumper lead between positive terminal of battery (+) and "S" for checking solenoid operation. It means that if after this test, starter runs properly, one can conclusively say solenoid is ok otherwise; there must be other issues like wiring or neutral start switch or even a problem with ignition switch itself. When this happens take out the whole assembly so as to do thorough inspection using appropriate methods and repair where necessary. First check whether your battery has power and all its connectors are tight in case you hear your engine cranking but very slowly. If oil viscosity differs from what is recommended by manufacturer, cranking would also be slow especially if some parts have already seized hence requiring immediate action taken against them even without dismantling an engine's cylinder block componene.If this normal operating temperature runs up, shut off vehicle's engine; detach coil wire from distributor cap and ground it to any part of the engine. With negative lead connected to earth, positive lead is attached to terminal coming out from the starter on solenoid. When an instant reading displays, go ahead with cranking operation under which you will record volts from a voltmeter. Do not run your starter for over 15 seconds at any given time. For instance, if the speed of cranking is normal and ammeter shows 9volts or more , such readings would be considered normal in this case so one should not worry or think about replacing parts.What will show that your engine starter is damaged while its reading is above nine volts, If the non-stop turning of this device results in a low ammeter readout say below 9 volts, then solenoid contacts have likely burned out.
