Check that the battery is fully charged before diagnosing starter problems. If the starter does not turn at all when the switch is operated, verify if the shift lever is in Neutral or Park (automatic transmission) or if the clutch pedal is depressed (manual transmission). Make sure that both cables at the battery and
Starter Solenoid terminals are clean and secure, and also ensure that the battery is charged. When the starter spins but the engine doesn't crank, it means that overrunning clutch inside it has slipped and hence requires replacement of the starter. When you hear a clicking sound from the solenoid but nothing happens with the starter, then it could be due to a faulty battery, main solenoid contacts, the whole starter itself, or else a seized engine. In case you cannot hear any sound from the solenoid plunger while switching it on, indicating that your solenoid may be bad due to a burned fusible link, defective solenoid, or dead battery. To test this solenoid, connect a jumper lead between the positive (+) terminal of the battery and the ignition switch wire terminal on it. The start operating end shows its condition as normal if it operates well there since this confirms that either the ignition switch should be worked on, the neutral start switch needs repairs, or a wiring problem has occurred. If this happens then remove the assembly of starter/solenoid for dissection; testing (with) repair purposes. If the starter cranks very slowly make sure that your terminals are tight, and check to see whether the battery is charged. It may crank slowly if the engine is partially seized or has the wrong viscosity oil. To test the starting motor, run the engine until normal operating temperature is reached, disconnect the coil wire from the distributor cap running to ground on the engine. Connecting a voltmeter positive lead to the positive battery post joining the negative lead to the negative post. Crank the engine and take voltmeter readings as soon as a steady figure is indicated, not exceeding 15 seconds of the starter turning. A reading of 9 volts or more at normal cranking speed is normal, indicating a faulty Starter if the cranking speed is slow. If the reading is less than 9 volts and the cranking speed is slow, it could indicate burned solenoid contacts, a bad starter, discharged battery, or a bad connection.