Trouble dead, directly connected to the battery power is not very simple? Why the headlamp but also regulator Oh, direct access to the power is not it?
Point battery continuous power supply, voltage and current do not search for a long time to keep the standard constant, so to stabilize the steady flow, otherwise, long time your headlamps will be a bright one will be dark
Automotive relay is a protective effect, with a small current control of high current way to prevent the switch contact burning, protection switch control lines.
A relay is an automatic control device that will change in output when the input quantity (electrical, magnetic, acoustic, light, thermal) reaches a certain value. Automotive relays are used to control the operation and stop of electrical appliances in the car. In fact, it is a kind of "automatic switch" which controls the larger current with smaller current. It plays the role of automatic adjustment, safety protection and conversion circuit in the circuit The Relay control loop current is small, and its contacts can turn on a larger current, so the car relay is generally used to control the larger power of electrical appliances, such as headlights, heater and so on. If the direct control by the switch these high-power electrical appliances can easily damage the circuit switch, fuse and so on. After using the relay switch only control the relay, the relay and then control the electrical equipment, and the relay control loop current is small, thus protecting the switch and line.
