LEMON Manuals: Even more car manuals for everyone
Home >> BMW >> 2003 >> X5 46i >> Repair and Diagnosis >> Accessories & Equipment >> Exterior Lights >> Lighting Systems - Overview - E38, E39 & E53 >> Lighting Systems >> Xenon Headlight Systems >> Phases Of Bulb Operation >> Functional Description

Functional Description

To regulate the power supply to the bulbs, additional components are required. The xenon control modules (1 per light) receive operating power from the LCM when the headlights are switched on.

The xenon control modules provide the regulated power supply to illuminate the bulbs through their phases of operation. The igniters establish the electric arcs. Integral coils generate the initial high voltage starting pulses from the control module provided starting voltage. Thereafter they provide a closed circuit for the regulated power output from the

Fig 1: Identifying Xenon Control Modules
G03398658Courtesy of BMW OF NORTH AMERICA, INC.