HELLA 007903001 24V 10/20A SPDT Relay , Black 24 Volt 10/20A SPDT relay for automotive use The relay can be operated by a dashboard switch or another 24 Volt input The SPDT change over relay switches electrical load from one use to another Change over relays are used for switching 2-state applications such as heated rear windows, fan motors, or the movement of a sliding sunroof HELLA quality and performance