Where is the wiper relay located on a BMW 320?
1 Answers
BMW 320 wiper relay is located on the wiper control lever behind the right side of the steering wheel. Composition of the relay: Automotive relays consist of two main parts: a control circuit that operates via electromagnetic coil and a main circuit that functions through contact points. In the relay's control circuit, only a relatively small operating current flows. This is because the contact capacity of the operating switch is limited and cannot directly control high-power loads. The relay's contacts are used to control circuit on/off states instead. Working principle of relays: A relay serves both as a control switch and as a controlled device (actuator). Taking the fuel pump relay as an example: it acts as the control switch for the fuel pump. However, the relay's coil can only complete the circuit through the ECU's ground connection when the driving transistor in the electronic control unit is activated.