When opened by the starter switch, it sends electricity from the battery to the starter motor to start the car.
The solenoid in normally by the starter motor and is a relay so the starter switch does not conduct the full amps needed to turn the engine.
The starter solenoid is physically mounted on top of the starter motor itself.
It can be a defective starter assembly that causes this problem. There are two parts to a starter assembly: the starter motor and the starter solenoid. The offending culprit is usually the starter solenoid, and it should be replaced.
disconnect the negative side of the battery. raise car and from underneath, disconnect the solenoid wire and battery cabble from the starter motor solenoid,remove the 2 starter motor boltsremove the starter and note the position of the starter shim if equipped. some cars don't have it. installation is the reverse.
No a solenoid switch (full name) does not control a cars electrical system. The solenoid is an electrically operated switch that sends power to the starter motor which in turn cranks the car's engine to start it. The reason a second (electrical) switch is needed to crank the starter motor, is that the starter motor requires such high voltage that the key would melt if all that power were to run through it. In other words; When you turn the key you are sending a small amount of power to the solenoid switch which in turn sends a large amount of power to the starter motor.
Try starting the car. If it doesn't start, then you might have a low charge in your battery! Turn the headlights on and then try to start the car - if the lights dim and you can hear the starter motor solenoid "click" or the starter turns the engine slowly then your battery is more than likely at fault. -if the lights don't dim and you can't hear anything from the starter motor then it is likely to be a loose earth connection or a loose connection to the starter motor solenoid (the thin cable out of the two that connect to your starter motor) Simples.
Starter motor.
dead battery bad starter solenoid bad starter loose or corroded battery or starter cables
the solenoid is broken. sometimes if you strike the starter motor sharply this cures the problem.
It is the copper plate inside the starter solenoid that when energized connects 12 volts to the starter motor. On older cars ( 60's and 70's ) it will be on the firewall, on newer cars it is attached to the starter.
It is mounted on the starter motor itself. When you get another starter, it will have the solenoid mounted on it already. If it is bad, just replace the starter, I would not change just the solenoid.
mounted on the top side of starter motor.