Normal Operation

The headlamp switch supplies the instrument cluster with the headlamp switch position status through circuit 64S-LK29 (BU/RD). The instrument cluster then sends a pulse width modulated (PWM) signal, over the communication network, to the front electronic module (FEM) which measures the voltage and adjusts the intensity of the dimmable backlighting system according to the voltage reading. The instrument cluster is grounded by circuit 31-AL11 (BK).