Replacing a gas discharge lamp (VW Passat B6)

Note: The left and right gas discharge lamps can be checked using the diagnostics of the actuator of the on-board power supply control unit.

Note: The illustrations show the replacement of the gas discharge lamp on the right headlight.

Note: The left and right gas discharge lamps are replaced in the same way.

Removal

Turn off the ignition and all electrical consumers and turn the key to position 0 (preliminary stop).

Remove the headlight.



Press the wire clip 1 in the direction of the arrow to the side (Fig. 7.73).



Remove cover 1 with headlight power module 2 in the direction of the arrow from the headlight as far as the length of the wires allows (Fig. 7.74).

Note: It is not necessary to unscrew the headlight power module 2 from the cover 1.

Unlock the plug connectors and remove the plugs (Fig. 7.75).

Note: The pressure inside the gas discharge lamp is from 7 (cold) to 100 bar (heated). The temperature around the heated gas discharge lamp reaches 700°C.

Caution: The gas discharge lamp may explode, so there is a risk of burns.

Caution: Be sure to wear safety glasses and gloves when removing and installing the lamp.

Disconnect plug 1 from gas discharge lamp 2 (Fig. 7.76).

Unlock the wire clip 1 and fold it aside.




Carefully remove gas discharge lamp 2 from the mount (Fig. 7.77).

Installation

Installation is carried out in the reverse order, taking into account the following.

Note: When installing a gas discharge lamp, do not touch its glass bulb. Fingers leave greasy marks on the glass of the lamp, which evaporate after turning on the headlights, and the light of the lamp may dim.

Note: Never subject the glass bulb of the gas discharge lamp to mechanical impact. The glass bulb is very sensitive and, in addition, is under high pressure.

Note: Avoid looking directly into the focused light beam as the UV radiation from a discharge lamp is approximately 2.5 times greater than that of a conventional halogen light.

When installing the holder with the headlight power module, pay attention to the correct seating of the seal. Water getting inside the headlight will destroy it.

If a headlight with an automatic corrector has been removed, then after installation it is necessary to perform a basic adjustment of the headlights.

Insert the gas discharge lamp so that the locking tabs fit into the grooves on the reflector.

Check the operation of the headlight, including all its functions.

Check the headlight settings and adjust if necessary.