An idle starter solenoid can receive a large electric current from the car battery and a small electric current from 

the ignition switch. When the igenition switch is truned on, a small electric current is sent through the 

starter solenoid .This cause the starter solenoid to close a pair of heavy contacts, thus relaying a large 

electric current through the starter motor, whcih in turn sets the engine in motion.

** 12V  4P

**Normally Open

**Circuitry:SPST

**Contacts: Cooper

**Coil  Resistance: 15± 2Ohm

** Continuous Rating : 100A

**Maximum Current Make:150A

** Temperture Range : -30 ± 80℃

**Housing:Metal

If a starter solenoid receives insufficient power from the battery, it will fail to start the motor, and may produce a rapid clicking sound. 

The lack of power can be caused by a low battery, by corroded or loose connections in the battery cable, 

or by a damaged positive (red) cable from the battery. Any of these problems will result in some, but not enough, 

power being sent to the solenoid, which means that the solenoid will only begin to push the engagement gear, 

making the metallic click sound.