WDS Wiring Diagram System - E90

• Complete vehicle
• Component and signal information
• Service functions

• Components
• Signals
• Plug-in, comb-type and solder connectors

• A_Control units, modules
• B_Sensors, transducers
• E_Lamps, electrical heaters
• F_Fuses
• G_Power supply, triggering units
• H_Acoustic and optical signalling units
• I_Components of outside manufacturer
• K_Relays
• L_Coils
• M_Electric motors, drives
• N_Amplifiers, controllers, control units
• R_Resistors, potentiometers
• S_Switch, button
• T_Ignition coils
• U_Radio/interference-suppression equipment
• W_Aerials, shields
• Y_Electromechanical components
• Z_Interference-suppression coils

• H1b Siren and tilt alarm sensor
• H2a Left horn
• H3a Right horn
• H8a Direction indicator light repeater, front right
• H9a Direction indicator light repeater, front left
• H34a Auxiliary brake light
• H40 Parking aid speaker
• H45 Parking aid speaker, rear
• H4a Direction indicator light, front right
• H50a Tweeter, front right
• H54 Mid-range speaker, front right
• H55 Mid-range speaker, front left
• H59a Tweeter, front left
• H66 Subwoofer, right
• H66a Subwoofer, left
• H70a Mid-range speaker, rear left
• H71a Mid-range speaker, rear right
• H77 Centre speaker
• H78a Mid-range speaker, rear left door
• H79a Mid-range speaker, rear right door