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Xenon Headlamps, Description Of Operation: General

Fig 1: Identifying Xenon Headlamps
G03869850Courtesy of SAAB-SCANIA OF AMERICA, INC.

The headlamp contains a xenon lamp with ignition transformer, control module, headlamp levelling motor, halogen bulb and parking light bulb.

A 70mm ellipsoid lens forms the light pattern together with the xenon lamp and reflector. The headlamp is equipped with a clear plastic protective lens that does not refract the light.

There is a halogen bulb mounted in the lamp housing. Only the halogen bulb lights up when the main beam flashers are used while the dipped beam is turned off.

The halogen bulb does not come on simultaneously with the xenon lamp for main beam on the US/CA/JP markets.

On other markets, the halogen bulb comes on together with the xenon lamp for main beam.