Cadillac 2010 CTS Sport Sedan Owner's Manual

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9-36 Vehicle CareNotice: Do not cover a headlampto improve beam cut-off whenaiming. Covering a headlamp maycause excessive heat build-upwhich may cause damage to theheadlamp.6. Turn on the low-beamheadlamps and place a piece ofcardboard or equivalent in frontof the headlamp not beingaimed. This should allow onlythe beam of light from theheadlamp being aimed to beseen on the flat surface.Driver Side Shown7. Locate the vertical headlampaiming screws, which are underthe hood near each headlampassembly. They are covered bya rubber caps.The adjustment screw can beturned with a 6 mm hex driver.8. Turn the vertical aiming screwuntil the headlamp beam isaimed to the horizontaltape line. Turn it clockwise orcounterclockwise to raise orlower the angle of the beam.The top edge of the cut-offshould be positioned at thebottom edge of the horizontaltape line.9. Make sure that the light from theheadlamp is positioned at thebottom edge of the horizontaltape line. The lamp on theleft (A) shows the correctheadlamp aim. The lamp on theright (B) shows the incorrectheadlamp aim.10. Repeat Steps 7 through 9 forthe opposite headlamp.