Which part of the car is a relay?

pu1. Simply put, it's an electromagnet switch. In the case of a general switch, as the amount of voltage or current increases, the switch itself needs to increase in order to receive a flowing current, and if a relay switch is used, it can be made small, so it is used in a headlight in a vehicle. The method is that when an electric current flows through an electromagnet, a magnetic force is generated, and the electric current flows by making the iron that was separated at this time stick together. So you can hear the clicking sound when you use the relay switch.

2017-11-20

OK

pu2. There are 3 pins, 4 pins, and 5 pins in relay, but usually 5 pins are used in cars

2017-11-20

OK