While there are several tests for the starter on a vehicle, bench testing provides a definitive answer to a car that does not crank. However, before removing the starter from the vehicle, EasyAutoDiagnostics.com recommends eliminating other possible reasons for the car not cranking.
The starter motor of a car works by engaging with a gear found on the flywheel of the engine to start the combustion process. A starter motor and a starter solenoid comprise the starting system of a car.
To replace a starter motor, locate the old starter in the vehicle, and disconnect the wires at the top of it. Unbolt the starter with a socket wrench, pull the old starter away, and place the new starter in the same position, reconnecting it to the wires and bolts.
An electric starter motor works by generating a heavy electric current at high speeds to turn and start an engine. The starter motor is equipped with a large electric switch that turns on and then off automatically in a short period of time. The electric switch is made to withstand high currents fro
Three-phase motors are rotating electric machines powered from a three-phase source of alternating current. The motors have two main components: the stator and the rotor. A rotating magnetic field produced in the stator induces electromagnetic flux in the rotor. In turn, current in the rotor flows i
To test a single-phase motor, first remove the cover of the motor’s wire, and disconnect the wires. Test the lead using the volt-ohm tester followed by a capacitor. Protect yourself from electric shocks by wearing safety gear. Ensure you have a pair of gloves and safety glasses because the voltage o
Wiring a three-phase motor begins with turning off the circuit that supplies power to the motor. Open the motor wiring box, and check for a nameplate with the wiring information. Connect all of the wiring with the right size, and number that coordinate with the conductors you want to use. You can ei
A three-phase motor should be wired with the positive and negative ends connecting to the corresponding power sources. The motor wires generally do not have symbols or colors that indicate the positivity or negativity of the wires, so the motor should be tested in a controlled environment before it
A car's starter motor is an electric motor that engages and turns the main crankshaft, drawing air and fuel into the cylinders so the engine can start. To do this, the starter draws heavy current through the battery, engages a flywheel or flexplate connected to the crankshaft, and turns it.
It is possible to perform a continuity test on a 3 phase motor, although it is slightly more labor intensive than for a single-phase motor. For the 3 phase motor a person needs to check both the phase to ground and each phase to phase aspect using a continuity tester, a multimeter or a megger.