Checking electrical systems (BMW X5 E53)

As part of the maintenance, it is necessary to check the proper functioning of the electrical equipment system:

• external lighting;
• illumination of the engine compartment and trunk;
• interior lighting;
• emergency light signaling;
• instrument cluster illumination;
• backlighting of inscriptions;
• operation of switches, controls and regulators;
• fan operation at all air supply speeds;
• operation of air distribution dampers;
• operation of the sound signal;
• operation of the on-board computer;
• operation of audio equipment and additional equipment.