14.1. General information, diagnostics of malfunctions
BMW E38 cars are equipped with 12-volt system of electric equipment with grounding on a negative pole. A food of all lighting devices and electric units is carried out from the battery recharged from the generator of an alternating current.
This head is devoted to the description of procedures of service and repair of some components of system of onboard electric equipment to which number besides the concrete components considered below, all lighting devices and the electric accessories not connected directly with the engine belong also. Besides, procedures of diagnostics of malfunctions of electric equipment of the general order are considered. Information on the battery, the generator and a starter is provided in the Head of System of electric equipment of the engine.
At performance of any works on repair and service of components of system of electric equipment it is necessary to disconnect previously without fail a negative wire from the battery in order to avoid receiving an electrotrauma and/or ignition.