Lotus 2004 Eleven Service Notes page 325

Lotus Service Notes
MP.10 - FRONT LAMP ASSEMBLIES
Headlamp Units - Prior '07 M.Y.
The front clamshell incorporates, at each side, a headlamp housing, in each of which are mounted a halo-
gen projector type dip beam lamp (upper), and a halogen main beam lamp (lower), which also incorporates the
sidelamp bulb. A moulded plastic mask and clear acrylic cover are bonded together and are fitted over each
headlamp housing, with a rubber surround finisher, with the unit retained by three slotted thumbscrews acces-
sible from within the front wheelarch. For access to the headlamps, release the three socket head screws and
withdraw the headlamp cover assembly.
HEADLAMP COVER UNIT SOCKET BOLTS
Headlamp bulbs may be replaced after disconnecting the cables (Dip; blue/yellow, black. Main; blue/
black, black) and releasing the spring clip. Both the 55W H1 dip beam bulb, and the 55W H7 main beam bulb
incorporate orientation features which must be correctly located on re-fitting. The holder for the T4W bayonet
fitting sidelamp bulb may be twisted to release from the main beam headlamp.
If the car is to be used temporarily in an opposite drive hand territory, a masking lever incorporated in each
dip beam headlamp should be moved to provide a horizontal cut off and prevent dazzle.
Headlamp Beam Alignment
1. Using beam setting equipment compatible with ECE Regulation No.48 for 76/756/EEC, position the machine
between 300 and 700mm in front of the LH headlamp, and parallel with the two headlamp units using the
sight bar or similar device dependent on the machine design, to ensure cross car match. Use the guides
provided on the machine to ensure the correct height and lateral setting.
2. Switch on the headlamp dip beams (uppermost lamps), and check the lateral beam alignment. The 'knee
point' of the beam cut off line must lie within a tolerance of 2% to the passenger side, and 0%.
Check the vertical alignment of the dip beam which must lie within a tolerance of -0.5% and -2%.
3. If adjustment is required, from within each front wheelarch, using a 5mm hexagonal key, remove the three
socket head screws securing the headlamp cover/masks, and withdraw the covers complete with rubber
seal.
4. To adjust the dip beam laterally, adjust the dome headed screw at the upper inboard side of the dip beam
(uppermost) lamp, accessed from the front of the lamp. Turn clockwise to adjust the beam to the right.
Optimum setting is 0%.
To adjust the vertical aim of the dip beam, adjust the dome headed screw at the lower outboard side of
the lamp, accessed from the front. Turn clockwise to raise the beam. Optimum setting is -1.5%.
5. Repeat for the RH lamp.
6. Centralise the machine on the LH main beam (lowermost) lamp, and switch on the main beams. Check the
main beam alignment which should be centralised with the marker dot on the machine screen or slightly
below the horizontal. Optimum setting is 0%.
- To adjust the main beam laterally, adjust the dome headed screw at the upper inboard side of the lamp,
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Dip beam lamp
Main beam
lamp
ohs105a
Section MP
Sidelamp bulb
ohs107