Underhood Lamp

Battery positive voltage is applied at all times to the MONITORED LD relay 37 coil and switch side. The BCM applies a ground to the MONITORED LD relay 37 coil side, energizes the relay and closes the switch contacts. The BCM then allows battery positive voltage to the MONITORED LD fuse 2 and the underhood lamp. When the underhood is opened, its switch closes providing a ground circuit, and the underhood lamp illuminates.