A bridge rectifier is an electrical device that converts alternating current (AC) to direct current (DC). It is made up of four diodes connected in a specific configuration. Bridge rectifiers are used in a wide variety of applications, including power supplies, battery chargers, and motor controllers.
There are a few different ways to check a bridge rectifier. One way is to use a multimeter to measure the voltage across each diode. The voltage across each diode should be approximately the same. If the voltage across any diode is significantly different from the others, then the diode may be faulty.