In modern cars with internal combustion engines, the ignition switch provides the required power to the starter solenoid and the starter system’s other components, like the engine control unit and the ignition coil. If anyone of these parts is not working correctly, this can lead to a bad ignition switch.
Can a bad ignition switch cause starter problems?
A bad ignition switch won't be able to supply power to the starter motor, ignition system, and other engine controls, preventing the engine from starting. Keep in mind, however, that engine issues may also be caused by other electrical and mechanical problems, such as a dead battery or a faulty starter solenoid.
Is the ignition switch connected to the starter?
The ignition switch, usually located on the steering column, has a "hot" wire (or a direct connection to the battery), which routes current to the starter solenoid. A metal disc attached to the plunger then makes contact between two terminals which connect the battery directly to the starter.
Will engine crank if starter is bad?
Engine Won't Crank or Start
The most obvious sign of a bad starter is an engine that won't crank or start. Of course, there are many other issues besides a bad starter that can prevent the engine from cranking. A few examples include a bad battery, failed ignition switch, or an engine mechanical problem.
Related Question Can the ignition switch affect the starter?
How do you diagnose an ignition switch?
What will a bad ignition control module do?
a faulty ignition module can affect ignition timing, resulting in an engine that misfires and runs rough. the engine may also run well at low speed, but won't accelerate well. 3. stalling: a failing ignition module can occasionally prevent the engine from getting spark, causing it to stall.
What happens when a starter goes out?
When the starter drive gear is worn out or not engaging properly, it will often produce a grinding noise. This is similar to the one that is heard if you start your engine and then accidentally action the ignition switch again. If the grinding symptom is ignored, it may also result in damage to the engine flywheel.
Why does my starter keep cranking?
So, if your starter keep running, the problem could be stuck starter relay contacts, a continuous ground on the starter relay control coil, or a binding ignition lock cylinder that keeps the actually ignition switch in the START position. To diagnose the problem, first try rotating the lock cylinder.